Super-Small Package PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8351/8352 Series

Description

The S-8351/8352 series is a CMOS PFM-control step-up switching regulator (DC/DC Converter ICs) that mainly consists of a reference voltage source, an oscillator, and a comparator. The PFM controller allows the duty ratio to be automatically switched according to the load (light load: 50%, high output current: 75%), enabling products with a low ripple over a wide range, high efficiency, and high output current (product types A, B, and D). Products with a fixed duty ratio of 75% are also available (product type C). With the S-8351 series, a step-up switching regulator (DC/DC Converter ICs) can be configured by using an external coil, capacitor, and diode. The built-in MOS FET is turned off by a protection circuit when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the S-8351 series ideal for applications such as the power supply unit of portable equipment.

The S-8352 series, which features an external transistor, is suitable for applications requiring a high output current.

Features

• Low voltage operation

  Startup at 0.9 V min. (Iout = 1 mA) guaranteed

• Low input current

  During maximum operation 23.2 µA (Vout = 3.3 V, typ.), During shutdown 0.5 µA (max.)

• Duty ratio

  50/75%, built-in auto-switching-type PFM controller (product types A, B, D)
  75%, built-in fixed-type PFM controller (product type C)

• External parts

  Coil, capacitor, diode

• Output voltage

  Settable to between 2.0 to 6.5 V (product types A, B, C) or 1.5 to 6.5 V (product type D) in 0.1 V steps, accuracy of ±2.4%

• Shutdown function (product type A)

• Vdd / Vout separate type (product type D)

• External transistor type available (S-8352 series)

• Lead-free products

Applications

• Power supply for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supply for audio equipment such as portable CD/MD players

• Constant voltage power supply for cameras, video equipment, and communications equipment

• Power supply for microcomputers

Super-Small Package PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8351/8352 Series

Description

The S-8351/8352 series is a CMOS PFM-control step-up switching regulator (DC/DC Converter ICs) that mainly consists of a reference voltage source, an oscillator, and a comparator. The PFM controller allows the duty ratio to be automatically switched according to the load (light load: 50%, high output current: 75%), enabling products with a low ripple over a wide range, high efficiency, and high output current (product types A, B, and D). Products with a fixed duty ratio of 75% are also available (product type C). With the S-8351 series, a step-up switching regulator (DC/DC Converter ICs) can be configured by using an external coil, capacitor, and diode. The built-in MOS FET is turned off by a protection circuit when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the S-8351 series ideal for applications such as the power supply unit of portable equipment.

The S-8352 series, which features an external transistor, is suitable for applications requiring a high output current.

Features

• Low voltage operation

  Startup at 0.9 V min. (Iout = 1 mA) guaranteed

• Low input current

  During maximum operation 23.2 μA (Vout = 3.3 V, typ.), During shutdown 0.5μA(max.)

• Duty ratio

  50/75%, built-in auto-switching-type PFM controller (product types A, B, D)
  75%, built-in fixed-type PFM controller (product type C)

• External parts

  Coil, capacitor, diode

• Output voltage

  Settable to between 2.0 to 6.5 V (product types A, B, C) or 1.5 to 6.5 V (product type D) in 0.1 V steps, accuracy of ±2.4%

• Shutdown function (product type A)

• Vdd / Vout separate type (product type D)

• External transistor type available (S-8352 series)

• Lead-free products

Applications

• Power supply for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supply for audio equipment such as portable CD/MD players

• Constant voltage power supply for cameras, video equipment, and communications equipment

• Power supply for microcomputers

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8353/8354 Series

Description

The S-8353/54 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM controller (S-8353) and a PWM/PFM switching controller (S-8354).The step-up switching regulator (DC/DC Converter ICs) can be configured simply by attaching a coil, capacitor, and diode externally. In addition to the above features, the small package and low power consumption of this series make it ideal for portable device applications requiring high efficiency.The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM controller, which can vary the duty ratio linearly from 0% to 83% (from 0% to 78% for 250 kHz models), optimally-designed error amplifier, and phase compensation circuits.

The S-8354 Series features a PWM/PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9 V (IOUT = 1 mA )

• Low input current

  During maximum operation 23.2 μA (Vout = 3.3 V, typ.), During shutdown 0.5 μA (max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8354)
  15 to 83% (30 kHz and 50 kHz models), 15 to 78% (250 kHz models)

• External parts

  Coil, capacitor, and diode

• Output voltage

  Can be set in 0.1 V steps between 1.5 and 6.5 V (for VDD / VOUT separate types) or 2.0 and 6.5 V (for other than VDD / VOUT separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  30, 50, and 250 kHz

• Soft start function

  6 ms (50 kHz, typ.)

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8353/8354 Series

Description

The S-8353/54 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, a power MOS FET, an error amplifier, a phase compensation circuit, a PWM controller (S-8353) and a PWM/PFM switching controller (S-8354).

The step-up switching regulator (DC/DC Converter ICs) can be configured simply by attaching a coil, capacitor, and diode externally. In addition to the above features, the small package and low power consumption of this series make it ideal for portable device applications requiring high efficiency.

The S-8353 Series realizes low ripple, high efficiency, and excellent transient characteristics due to its PWM controller, which can vary the duty ratio linearly from 0% to 83% (from 0% to 78% for 250 kHz models), optimally-designed error amplifier, and phase compensation circuits.

The S-8354 Series features a PWM/PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9 V (IOUT = 1 mA )

• Low current consumption

  During operation 18.7 μA(3.3 V, 50 kHz, typ.),
  During shutdown 0.5 μA(max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8354)
  15 to 83% (30 kHz and 50 kHz models), 15 to 78% (250 kHz models)

• External parts

  Coil, capacitor, and diode

• Output voltage

  Can be set in 0.1 V steps between 1.5 and 6.5 V (for VDD / VOUT separate types) or 2.0 and 6.5 V (for other than VDD / VOUT separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  30, 50, and 250 kHz

• Soft start function

  6 ms (50 kHz, typ.)

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Step-up, Super-small Package, 1.2 MHz PWM / PFM Switchable Switchin Regulator S-8363 Series

Description

The S-8363 Series is a CMOS step-up switching regulator which consists of a referencevoltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a current limit circuit, and a start-up circuit. Due to the operation of the PWM / PFM switching control, pulses are skipped under the light load operation and the S-8363 Series prevents decrease in efficiency caused by IC’s operating current. The S-8363 Series is capable of start-up from 0.9 V (Iout = 1 mA) by the start-up circuit, and is suitable for applications which use one dry cell. The output voltage is freely settable from 1.8 V to 5.0 V by external parts. Ceramic capacitors can be used for output capacitor. Small packages SNT-6A and SOT-23-6 enable high-density mounting.

Features

• Low operation voltage

  Start-up from 0.9 V (Iout = 1 mA) guaranteed

• Oscillation frequency

  1.2 MHz

• Input voltage range

  0.9 V to 4.5 V

• Output current

  300 mA (Vin = 1.8 V, Vout = 3.3 V)

• Reference voltage

  0.6 V±2.5%

• Efficiency

  85%

• Soft start function

  1.2 ms typ.

• Low current consumption

  During switching-off, 95μA typ.

• Duty ratio

  – PWM / PFM switching control
  max.88%

• Power-off function

  Current consumption during power-off 3.0 µA max.

• Current limit circuit

  limits the peak value of inductor current

• Nch power MOS FET ON resistance

  0.25 Ω typ.

• Start-up function

  Operation with fixed duty pulse under the Vout voltage of 1.4 V or less

• Lead-free product

Applications

• MP3 players, digital audio players

• Digital cameras, GPS, wireless transceiver

• Portable devices

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8355/56/57/58 Series

Description

The S-8355/56/57/58 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8355/57) and a PWM/PFM switching control circuit (S-8356/58). With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current.

The S-8355/57 Series realizes low ripple, high efficiency, and excellent transient characteristics with the PWM control circuit whose duty ratio can vary from 0 % to 83 % (from 0 % to 78 % for 250 kHz and 300 kHz models), the best-designed error amplifier and phase compensation circuits.

The S-8356/58 Series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9V(Iout =1mA )

• Low current consumption

  During operation 25.9 μA (3.3V, 100 kHz, typ.), During shutdown 0.5 μA (max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8356/58)
  15 to 83% (100 kHz models), 15 to 78% (250 kHz and 300 kHz models)

• External parts

  coil, diode, capacitor, and transistor

• Output voltage

  0.1V step setting is available between 1.5 and 6.5V (for Vdd/Vout separate types) or 2.0 and 6.5V (for other than Vdd/Vout separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  100, 250, 300 and 600 kHz

• Soft start function

  6ms (100 kHz, typ.)

• Shutdown function

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8355/56/57/58 Series

Description

The S-8355/56/57/58 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8355/57) and a PWM/PFM switching control circuit (S-8356/58). With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current.

The S-8355/57 Series realizes low ripple, high efficiency, and excellent transient characteristics with the PWM control circuit whose duty ratio can vary from 0 % to 83 % (from 0 % to 78 % for 250 kHz and 300 kHz models), the best-designed error amplifier and phase compensation circuits.

The S-8356/58 Series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9V(Iout =1mA )

• Low current consumption

  During operation 25.9 μA (3.3V, 100 kHz, typ.), During shutdown 0.5 μA (max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8356/58)
  15 to 83% (100 kHz models), 15 to 78% (250 kHz and 300 kHz models)

• External parts

  coil, diode, capacitor, and transistor

• Output voltage

  0.1V step setting is available between 1.5 and 6.5V (for Vdd/Vout separate types) or 2.0 and 6.5V (for other than Vdd/Vout separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  100, 250, 300 and 600 kHz

• Soft start function

  6ms (100 kHz, typ.)

• Shutdown function

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8355/56/57/58 Series

Description

The S-8355/56/57/58 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8355/57) and a PWM/PFM switching control circuit (S-8356/58). With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current.

The S-8355/57 Series realizes low ripple, high efficiency, and excellent transient characteristics with the PWM control circuit whose duty ratio can vary from 0 % to 83 % (from 0 % to 78 % for 250 kHz and 300 kHz models), the best-designed error amplifier and phase compensation circuits.

The S-8356/58 Series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9V(Iout =1mA )

• Low current consumption

  During operation 25.9 μA (3.3V, 100 kHz, typ.), During shutdown 0.5 μA (max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8356/58)
  15 to 83% (100 kHz models), 15 to 78% (250 kHz and 300 kHz models)

• External parts

  coil, diode, capacitor, and transistor

• Output voltage

  0.1V step setting is available between 1.5 and 6.5V (for Vdd/Vout separate types) or 2.0 and 6.5V (for other than Vdd/Vout separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  100, 250, 300 and 600 kHz

• Soft start function

  6ms (100 kHz, typ.)

• Shutdown function

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Super-Small Package PWM Control, PWM/PFM Control Step-Up Switching Regulator (DC/DC Converter ICs) S-8355/56/57/58 Series

Description

The S-8355/56/57/58 Series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM control circuit (S-8355/57) and a PWM/PFM switching control circuit (S-8356/58). With an external low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current.

The S-8355/57 Series realizes low ripple, high efficiency, and excellent transient characteristics with the PWM control circuit whose duty ratio can vary from 0 % to 83 % (from 0 % to 78 % for 250 kHz and 300 kHz models), the best-designed error amplifier and phase compensation circuits.

The S-8356/58 Series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.

Features

• Low voltage operation

  Start-up is guaranteed from 0.9V(Iout =1mA )

• Low current consumption

  During operation 25.9 μA (3.3V, 100 kHz, typ.), During shutdown 0.5 μA (max.)

• Duty ratio

  Built-in PWM/PFM switching control circuit (S-8356/58)
  15 to 83% (100 kHz models), 15 to 78% (250 kHz and 300 kHz models)

• External parts

  coil, diode, capacitor, and transistor

• Output voltage

  0.1V step setting is available between 1.5 and 6.5V (for Vdd/Vout separate types) or 2.0 and 6.5V (for other than Vdd/Vout separate types).
  Accuracy of ±2.4%.

• Oscillation frequency

  100, 250, 300 and 600 kHz

• Soft start function

  6ms (100 kHz, typ.)

• Shutdown function

• Lead-free products

Applications

• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs

• Power supplies for audio equipment such as portable CD/MD players

• Constant voltage power supplies for cameras, video equipment, and communications equipment

• Power supplies for microcomputers

Step-Up, Super-Small Package, 1.2 MHz PWM Control or PWM/PFM Switchable Switching Regulator Controller S-8365/8366 Series

Description

The S-8365/8366 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a timer latch short-circuit protection circuit, a PWM control circuit (S-8365 Series) and a PWM / PFM switching control circuit (S-8366 Series). With an external low-ON-resistance Nch Power MOS, this product is ideal for applications requiring high efficiency and a high output current. The S-8365 Series efficiently works on voltage’s condition of large I/O difference due to the PWM control circuit linearly varies the duty ratio to 90%. During light-load, the S-8366 Series switches its operation to the PFM control by the PWM / PFM switching control circuit in order to prevent efficiency decline due to the IC operating current. Ceramic capacitors can be used for output capacitor. Small packages SNT-6A, SOT-23-5 and SOT-23-6 enable high-density mounting.

Features

• Low operation voltage

  Start at 1.1 V (1 mA) guaranteed (in the product without UVLO function)

• Input voltage range

  1.8 V to 5.5 V

• Oscillation frequency

  1.2 MHz, 600 kHz

• Reference voltage

  0.6 V±2.0%

• Soft start function

  7 ms typ.

• Low current consumption

  70μA typ. at switching off

• Duty ratio

  Built-in PWM / PFM switching control circuit (S-8366 Series)
  28% to 85% (1.2 MHz product)
  28% to 90% (600 kHz product)

• Shutdown function

  Current consumption 1.0 µA max. at shutdown

• External parts

  Inductor, diode, capacitor, transistor

• Timer latch short-circuit protection circuit

  Selectable with / without short-circuit protection circuit for each product
  Settable delay time by external capacitor (in the product with short-circuit protection)

• UVLO (under-voltage lockout) function

  Selectable with / without UVLO for each product

• Lead-free product

Applications

• MP3 players, digital audio players

• Digital cameras, GPS, wireless transceiver

• Portable devices

Step-Up, Super-Small Package, 1.2 MHz PWM Control or PWM/PFM Switchable Switching Regulator Controller S-8365/8366 Series

Description

The S-8365/8366 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a timer latch short-circuit protection circuit, a PWM control circuit (S-8365 Series) and a PWM / PFM switching control circuit (S-8366 Series). With an external low-ON-resistance Nch Power MOS, this product is ideal for applications requiring high efficiency and a high output current. The S-8365 Series efficiently works on voltage’s condition of large I/O difference due to the PWM control circuit linearly varies the duty ratio to 90%. During light-load, the S-8366 Series switches its operation to the PFM control by the PWM / PFM switching control circuit in order to prevent efficiency decline due to the IC operating current. Ceramic capacitors can be used for output capacitor. Small packages SNT-6A, SOT-23-5 and SOT-23-6 enable high-density mounting.

Features

• Low operation voltage

  Start at 1.1 V (1 mA) guaranteed (in the product without UVLO function)

• Input voltage range

  1.8 V to 5.5 V

• Oscillation frequency

  1.2 MHz, 600 kHz

• Reference voltage

  0.6 V±2.0%

• Soft start function

  7 ms typ.

• Low current consumption

  70μA typ. at switching off

• Duty ratio

  Built-in PWM / PFM switching control circuit (S-8366 Series)
  28% to 85% (1.2 MHz product)
  28% to 90% (600 kHz product)

• Shutdown function

  Current consumption 1.0 µA max. at shutdown

• External parts

  Inductor, diode, capacitor, transistor

• Timer latch short-circuit protection circuit

  Selectable with / without short-circuit protection circuit for each product
  Settable delay time by external capacitor (in the product with short-circuit protection)

• UVLO (under-voltage lockout) function

  Selectable with / without UVLO for each product

• Lead-free product

Applications

• MP3 players, digital audio players

• Digital cameras, GPS, wireless transceiver

• Portable devices

PWM Control & PWM/PFM Control High Frequency Step-Up Switching Regulator (DC/DC Converter ICs) S-8340/8341 Series

Description

The S-8340/8341 series consists of CMOS step-up switching regulator (DC/DC Converter ICs)-controllers with PWM control (S-8340) and PWM/PFM switched control (S-8341). These devices contain a reference voltage source, oscillation circuit, error amplifier, phase compensation circuit, PWM control circuit, and other components. Since the oscillation frequency is a high 300 kHz or 600 kHz, with the addition of a small external component, the ICs can function as step-up switching regulators with high efficiency and large output current. The speed of the output stage is enhanced so that the Nch power MOS with a low ON resistance can be switched quickly.
The S-8340 provides low-ripple power, high-efficiency, and excellent transient characteristics thanks to a PMW control circuit capable of varying the duty ratio linearly from 0% to 82% and optimized error amplifier, and phase compensation circuit.
The S-8341 contains a PWM/PFM switching control circuit so that it operates using PWM control with a duty ratio of 27% or higher and using PFM control with a duty ratio of lower than 27% to ensure high efficiency in all load ranges. These ICs serve as ideal main power supply units for portable devices when coupled with the 8-pin TSSOP package and high oscillation frequencies.

Features

• Oscillation frequency

  600 kHz (A & B series), 300 kHz (C & D series).

• Output voltage

  Internally selectable in the range 2.5V to 6.0V in steps of 0.1V (Output voltage fixed output type)

• Output voltage precision

  ±2.0%

• Output voltage external setting (FB) type available. FB terminal voltage (VFB) 1.0V

• The only peripheral components that can be used with this IC are a transistor, a coil, a diode, capacitors (3), and a resistor.

• Duty ratio

  0% to 82% typ. PWM control (S-8340)
  27% to 82% typ. PWM/PFM-switched control (S-8341, A & B series)
  21% to 82% typ. PWM/PFM-switched control (S-8341, C & D series)

• Low-voltage operation

  Oscillation can start when VDD=0.9V.

• Built-in current limiting circuit

  Can be set with an external resistor (RSENSE).

• Soft-start function

  Can be set with an external capacitor (CSS).

• With a power-off function.

• Lead-free products

Applications

• Power supplies for PDAs, electronic notebooks, and portable devices

• Power supplies for audio equipment, including portable CD players, portable MD players and headphone stereo equipment

• Main and sub power supplies for notebook computers and peripheral equipment

• Fixed voltage power supply for cameras, video equipment and communications equipment

PWM Control & PWM/PFM Control High Frequency Step-Up Switching Regulator (DC/DC Converter ICs) S-8340/8341 Series

Description

The S-8340/8341 series consists of CMOS step-up switching regulator (DC/DC Converter ICs)-controllers with PWM control (S-8340) and PWM/PFM switched control (S-8341). These devices contain a reference voltage source, oscillation circuit, error amplifier, phase compensation circuit, PWM control circuit, and other components. Since the oscillation frequency is a high 300 kHz or 600 kHz, with the addition of a small external component, the ICs can function as step-up switching regulators with high efficiency and large output current. The speed of the output stage is enhanced so that the Nch power MOS with a low ON resistance can be switched quickly.
The S-8340 provides low-ripple power, high-efficiency, and excellent transient characteristics thanks to a PMW control circuit capable of varying the duty ratio linearly from 0% to 82% and optimized error amplifier, and phase compensation circuit.
The S-8341 contains a PWM/PFM switching control circuit so that it operates using PWM control with a duty ratio of 27% or higher and using PFM control with a duty ratio of lower than 27% to ensure high efficiency in all load ranges. These ICs serve as ideal main power supply units for portable devices when coupled with the 8-pin TSSOP package and high oscillation frequencies.

Features

• Oscillation frequency

  600 kHz (A & B series), 300 kHz (C & D series).

• Output voltage

  Internally selectable in the range 2.5V to 6.0V in steps of 0.1V (Output voltage fixed output type)

• Output voltage precision

  ±2.0%

• Output voltage external setting (FB) type available. FB terminal voltage (VFB) 1.0V

• The only peripheral components that can be used with this IC are a transistor, a coil, a diode, capacitors (3), and a resistor.

• Duty ratio

  0% to 82% typ. PWM control (S-8340)
  27% to 82% typ. PWM/PFM-switched control (S-8341, A & B series)
  21% to 82% typ. PWM/PFM-switched control (S-8341, C & D series)

• Low-voltage operation

• Oscillation can start when VDD=0.9V.

• Built-in current limiting circuit

  Can be set with an external resistor (RSENSE).

• Soft-start function

  Can be set with an external capacitor (CSS).

• With a power-off function.

• Lead-free products

Applications

• Power supplies for PDAs, electronic notebooks, and portable devices

• Power supplies for audio equipment, including portable CD players, portable MD players and headphone stereo equipment

• Main and sub power supplies for notebook computers and peripheral equipment

• Fixed voltage power supply for cameras, video equipment and communications equipment

Step-up, for LCD Bias Supply, 1-channel, PWM Control Switching Regulator Controller S-8333 Series

Description

The S-8333 Series is a CMOS step-up switching regulator which mainly consists of a reference voltage circuit, an oscillator, an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO), and a timer latch short-circuit protection circuit. Because its minimum operating voltage is as low as 1.8 V, this switching regulator is ideal for the power supply of an LCD or for portable systems that operate on a low voltage. The internal oscillation frequency can be set up to 1.08 MHz, via the resistor connected to the ROSC pin. The maximum duty ratio of PWM control can be controlled by the resistor connected to the RDuty pin. The soft-start function at power application is accomplished by combining the reference voltage control and maximum duty control methods. Even if the voltage of the FB pin is retained lower than the reference voltage due to the factor outside the IC, the output voltage is raised by controlling the maximum duty. The phase compensation and gain value can be adjusted according to the values of the resistor and capacitor connected to the CC pin. Therefore, the operation stability and transient response can be correctly set for each application. The reference voltage accuracy is as high as 1.0 V ±1.5%, and any voltage can be output by using an external output voltage setting resistor. In addition, the delay time of the short-circuit protection circuit can be set by using the capacitor connected to the CSP pin. If the maximum duty condition continues because of short-circuiting, the capacitor externally connected to the CSP pin is charged, and oscillation stops after a specific time. The short-circuit protection function is cancelled when the power supply is raised to the UVLO release voltage after it has been lowered to the UVLO detection voltage. A ceramic capacitor or a tantalum capacitor is used as the output capacitor, depending on the setting. This controller IC allows various settings and selections and employs a small

Features

• Low voltage operation

  1.8 V to 6.0 V

• Oscillation frequency

  280 kHz to 1.08 MHz (selectable by external resistor)

• Maximum duty

  47 to 88.5% (selectable by external resistor)

• Reference voltage

  1.0 V±1.5%

• UVLO (under-voltage lockout) function

  Detection voltage can be selected from between 1.5 V and 2.3 V in 0.1 V steps. Hysteresis width can be selected from between 0.1 V and 0.3 V in 0.1 V steps.

• Timer latch short-circuit protection circuit

  Delay time can be set using an external capacitor.

• Soft-start function

  Soft-start time can be selected in three steps, 10 ms, 15 ms, and 20 ms. Both reference voltage control and maximum duty control methods are applied

• Phase compensation external setting

  Control is possible via the resistor connected between the CC and GND pins and capacitor

• Small package

  SNT-8A, 8-Pin TSSOP

Applications

• Power supplies for LCDs and CCDs

• Power supplies for portable equipment

Step-up High-frequency, PWM Control Switching Regulator (DC/DC Converter ICs) Controllers S-8337/8338 Series

Description

The S-8337/38 series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage circuit, an oscillator, an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO), and a timer latch short-circuit protection circuit. Because its minimum operating voltage is as low as 1.8 V, this switching regulator (DC/DC Converter ICs) is ideal for the power supply of an LCD or for portable systems that operate on a low voltage. The internal oscillation frequency can be set up to 1.133 MHz, via the resistor connected to the ROSC pin.

With the S-8337 series, the maximum duty ratio of PWM control can be controlled by the resistor connected to the RDuty pin. With the S-8338 series, the maximum duty ratio is fixed (to 88%). The phase compensation and gain value can be adjusted according to the values of the resistor and capacitor connected to the CC pin. Therefore, the operation stability and transient response can be correctly set for each application. The reference voltage accuracy is as high as 1.0 V ±1.5%, and any voltage can be output by using an external output voltage setting resistor.

In addition, the delay time of the short-circuit protection circuit can be set by using the capacitor connected to the CSP pin. If the maximum duty condition continues because of short-circuiting, the capacitor externally connected to the CSP pin is charged, and oscillation stops after a specific time. This condition is cleared by re-application of power or by setting the switching regulator(DC/DC Converter ICs) (S-8338 series) to the shutdown status. A ceramic capacitor or a tantalum capacitor is used as the output capacitor, depending on the setting. This controller IC allows various settings and selections and employs a small package, making it very easy to use.

Features

• Low voltage operation

  1.8 V to 6.0 V

• Oscillation frequency

  286 kHz to 1.133 MHz (selectable by external resistor)

• Maximum duty

  47 to 88.5% (selectable by external resistor) (S-8337 series)
  Fixed to 88% typ. (S-8338 series)

• Reference voltage

  1.0 V±1.5%

• UVLO (under-voltage lockout) function

  Detection voltage can be selected from between 1.5 V and 2.3 V in 0.1 V steps.
  Hysteresis width can be selected from between 0.1 V and 0.3 V in 0.1 V steps.

• Timer latch short-circuit protection circuit

  Delay time can be set using an external capacitor.

• Soft-start function

  Soft-start time can be selected in three steps, 10 ms, 15 ms, and 20 ms.

• Phase compensation external setting

  Adjustable by connecting resistor and capacitor in series to GND.

• Shutdown function

  S-8338 series, shutdown current consumption: 1.0 μA max.

• Lead-free products

Applications

• Power supplies for LCDs and CCDs

• Power supplies for portable equipment

Step-up High-frequency, PWM Control Switching Regulator (DC/DC Converter ICs) Controllers S-8337/8338 Series

Description

The S-8337/38 series is a CMOS step-up switching regulator (DC/DC Converter ICs) which mainly consists of a reference voltage circuit, an oscillator, an error amplifier, a PWM controller, an under voltage lockout circuit (UVLO), and a timer latch short-circuit protection circuit. Because its minimum operating voltage is as low as 1.8 V, this switching regulator (DC/DC Converter ICs) is ideal for the power supply of an LCD or for portable systems that operate on a low voltage. The internal oscillation frequency can be set up to 1.133 MHz, via the resistor connected to the ROSC pin.

With the S-8337 series, the maximum duty ratio of PWM control can be controlled by the resistor connected to the RDuty pin. With the S-8338 series, the maximum duty ratio is fixed (to 88%). The phase compensation and gain value can be adjusted according to the values of the resistor and capacitor connected to the CC pin. Therefore, the operation stability and transient response can be correctly set for each application. The reference voltage accuracy is as high as 1.0 V ±1.5%, and any voltage can be output by using an external output voltage setting resistor.

In addition, the delay time of the short-circuit protection circuit can be set by using the capacitor connected to the CSP pin. If the maximum duty condition continues because of short-circuiting, the capacitor externally connected to the CSP pin is charged, and oscillation stops after a specific time. This condition is cleared by re-application of power or by setting the switching regulator(DC/DC Converter ICs) (S-8338 series) to the shutdown status. A ceramic capacitor or a tantalum capacitor is used as the output capacitor, depending on the setting. This controller IC allows various settings and selections and employs a small package, making it very easy to use.

Features

• Low voltage operation

  1.8 V to 6.0 V

• Oscillation frequency

  286 kHz to 1.133 MHz (selectable by external resistor)

• Maximum duty

  47 to 88.5% (selectable by external resistor) (S-8337 series)
  Fixed to 88% typ. (S-8338 series)

• Reference voltage

  1.0 V±1.5%

• UVLO (under-voltage lockout) function

  Detection voltage can be selected from between 1.5 V and 2.3 V in 0.1 V steps.
  Hysteresis width can be selected from between 0.1 V and 0.3 V in 0.1 V steps.

• Timer latch short-circuit protection circuit

  Delay time can be set using an external capacitor.

• Soft-start function

  Soft-start time can be selected in three steps, 10 ms, 15 ms, and 20 ms.

• Phase compensation external setting

  Adjustable by connecting resistor and capacitor in series to GND.

• Shutdown function

  S-8338 series, shutdown current consumption: 1.0 µA max.

• Lead-free products

Applications

• Power supplies for LCDs and CCDs

• Power supplies for portable equipment

Step-Down, Built-in FET, Synchronous Rectification, PWM Control Switching Regulator (DC/DC Converter ICs) S-8550 Series

Description

The S-8550 Series is a CMOS synchronous rectification step-down switching regulator which mainly consists of a reference voltage circuit, an oscillator, an error amplifier, a phase compensation circuit, a PWM controller, an under voltage lockout circuit (UVLO), a current limit circuit, and a power MOS FET. The oscillation frequency is high at 1.2 MHz, so a high efficiency, large output current, step-down switching regulator can be achieved by using small external parts. The built-in synchronous rectification circuit makes achieving high efficiency easier compared with conventional step-down switching regulators. A ceramic capacitor can be used as an output capacitor. High-density mounting is supported by adopting packages small SOT-23-5 and super-small and thin SNT-8A.

Features

• Oscillation frequency

  1.2 MHz

• Input voltage range

  2.0 to 5.5 V

• Output voltage range

  Arbitrarily settable by external output voltage setting resistor

• Output current

  600 mA

• Reference voltage

  0.6 V ±2.0%

• Efficiency

  92%

• Soft-start function

  1 ms typ.

• Shutdown function

  Shutdown current consumption: 1.0 µA max.

• Built-in current limit circuit

• Pch power MOS FET on-resistance

  0.4 Ω typ.

• Nch power MOS FET on-resistance

  0.3 Ω typ.

• Constant continuous mode operation (no light load mode)

• Lead-free, Sn 100%, halogen-free

Applications

• Mobile devices, such as mobile phones, Bluetooth devices, wireless devices, digital audio players, digital still cameras, portable DVD players, and portable CD players

PWM Control & PWM/PFM Control Step-Down Switching Regulator (DC/DC Converter ICs) S-8520/8521 Series

Description

The S-8520/8521 series consists of CMOS step-down switching regulator (DC/DC Converter ICs)-controllers with PWM-control (S-8520) and PWM/PFM-switched control (S-8521). These devices contain a reference voltage source, oscillation circuit, error amplifier, and other components.
The S-8520 series provides low-ripple power, high-efficiency, and excellent transient characteristics thanks to a PWM control circuit capable of varying the duty ratio linearly from 0% up to 100%. The series also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup.
The S-8521 series works with either PWM control or PFM control, and can switch from one to the other. It normally operates using PWM control with a duty ratio of 25% to 100%, but under a light load, it automatically switches to PFM control with a duty ratio of 25%. This series ensures high efficiency over a wide range of conditions, from standby mode to operation of peripheral equipment.
With the addition of an external Pch Power MOS FET or PNP transistor, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators (DC/DC Converter ICs). They serve as ideal power supply units for portable devices when coupled with the SOT-23-5 minipackage, providing such outstanding features as low current consumption. Since this series can accommodate an input voltage of up to 16V, it is also ideal when operating via an AC adapter.

Features

• Low current consumption

  In operation:
  60 μA. (A & B series)
  21 μA. (C & D series)
  100 μA. (E & F series)
  When powered off:
  0.5 μA.

• Input voltage

  2.5 V to 16 V (B, D, F series)
  2.5V to 10V (A, C, E series)

• Output voltage

  Selectable between 1.5V and 6.0V in steps of 0.1V.

• Duty ratio

  0% to 100% PWM control (S-8520)
  25% to 100% PWM/PFM-switched control (S-8521)

• The only peripheral components that can be used with this IC are a Pch power MOS FET or PNP transistor, a coil, a diode, and capacitors (If a PNP transistor is used, a base resistance and a capacitor will also be required).

• Oscillation frequency

  180 kHz typ. (A & B series), 60 kHz typ. (C & D series), or 300 kHz typ. (E, F series).

• Soft-start function

  8 msec. typ. (A & B series) 12 msec. typ.(C & D series), or 4.5 msec. typ. (E, F series).

• With a power-off function.

• With a built-in overload protection circuit.
  Overload detection time: 4 msec. typ. (A series), 14 msec. typ. (C series) or 2.6 msec. typ.(E, F series).

• Lead-free products

Applications

• On-board power supplies of battery devices for portable telephones, electronic notebooks, PDAs, and the like

• Power supplies for audio equipment, including portable CD players and headphone stereo equipment

• Fixed voltage power supply for cameras, video equipment and communications equipment

• Power supplies for microcomputers

• Conversion from four NiH or NiCd cells or two lithium-ion cells to 3.3V/3V

• Conversion of AC adapter input to 5V/3V

PWM Control & PWM/PFM Control Step-Down Switching Regulator (DC/DC Converter ICs) S-8520/8521 Series

Description

The S-8520/8521 series consists of CMOS step-down switching regulator (DC/DC Converter ICs)-controllers with PWM-control (S-8520) and PWM/PFM-switched control (S-8521). These devices contain a reference voltage source, oscillation circuit, error amplifier, and other components.
The S-8520 series provides low-ripple power, high-efficiency, and excellent transient characteristics thanks to a PWM control circuit capable of varying the duty ratio linearly from 0% up to 100%. The series also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup.
The S-8521 series works with either PWM control or PFM control, and can switch from one to the other. It normally operates using PWM control with a duty ratio of 25% to 100%, but under a light load, it automatically switches to PFM control with a duty ratio of 25%. This series ensures high efficiency over a wide range of conditions, from standby mode to operation of peripheral equipment.
With the addition of an external Pch Power MOS FET or PNP transistor, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators (DC/DC Converter ICs). They serve as ideal power supply units for portable devices when coupled with the SOT-23-5 minipackage, providing such outstanding features as low current consumption. Since this series can accommodate an input voltage of up to 16V, it is also ideal when operating via an AC adapter.

Features

• Low current consumption

  In operation:
  60 μA. (A & B series)
  21 μA. (C & D series)
  100 μA. (E & F series)
  When powered off:
  0.5 μA.

• Input voltage

  2.5 V to 16 V (B, D, F series)
  2.5V to 10V (A, C, E series)

• Output voltage

  Selectable between 1.5V and 6.0V in steps of 0.1V.

• Duty ratio

  0% to 100% PWM control (S-8520)
  25% to 100% PWM/PFM-switched control (S-8521)

• The only peripheral components that can be used with this IC are a Pch power MOS FET or PNP transistor, a coil, a diode, and capacitors (If a PNP transistor is used, a base resistance and a capacitor will also be required).

• Oscillation frequency

  180 kHz typ. (A & B series), 60 kHz typ. (C & D series), or 300 kHz typ. (E, F series).

• Soft-start function

  8 msec. typ. (A & B series) 12 msec. typ.(C & D series), or 4.5 msec. typ. (E, F series).

• With a power-off function.

• With a built-in overload protection circuit.
  Overload detection time: 4 msec. typ. (A series), 14 msec. typ. (C series) or 2.6 msec. typ.(E, F series).

• Lead-free products

Applications

• On-board power supplies of battery devices for portable telephones, electronic notebooks, PDAs, and the like

• Power supplies for audio equipment, including portable CD players and headphone stereo equipment

• Fixed voltage power supply for cameras, video equipment and communications equipment

• Power supplies for microcomputers

• Conversion from four NiH or NiCd cells or two lithium-ion cells to 3.3V/3V

• Conversion of AC adapter input to 5V/3V

PWM Control & PWM/PFM Control High Frequency Step-Down Switching Regulator (DC/DC Converter ICs) S-8540/8541 Series

Description

The S-8540/8541 series is a family of CMOS step-down switching regulator (DC/DC Converter ICs) controllers with PWM control (S-8540) and PWM/PFM switchover control (S-8541). These devices consist of a reference voltage source, oscillation circuit, an error amplifier, phase compensation circuit, PWM control circuit, current limit circuit. A high efficiency and large current switching regulator (DC/DC Converter ICs) is realized with the help of small external components due to the high oscillation frequency, 300 kHz and 600 kHz.

The S-8540 provides low-ripple voltage, high efficiency, and excellent transient characteristics which come form the PMW control circuit capable of varying the duty ratio linearly from 0% to 100%, the optimized error amplifier, and the phase compensation circuit.

The S-8541 operates under PWM control when the duty ratio is 29% or higher and operates under PFM control when the duty ratio is less than 29% to ensure high efficiency over all load range.

These controllers serve as ideal main power supply units for portable devices due to the high oscillation frequencies together with the small 8-pin MSOP package.

Features

• Oscillation frequency

  600 kHz (A & B series), 300 kHz (C & D series)

• Output voltage

  1.5V to 6.0V in steps of 0.1V (A & C series)

• Output voltage precision

  ±2.0%

• Feed back type for output voltage (FB)

• External components

  a transistor, a coil, a diode, and capacitors.

• Built-in PWM/PFM switchover control circuit (S-8541)

  Duty ratio: 29% (PFM control),
  29 to 100% (PWM control)

• Current limit circuit

  Current is set by an external resistor RSENSE.

• Soft-start

  Time is set by an capacitor CSS and a resistor RSS.

• Shutdown function

• Lead-free products

Applications

• Power supplies for PDAs, electric organizers, and portable devices

• Power supplies for audio equipment such as portable CD players and headphone stereos

• Main or sub power supplies for notebook computers and peripheral equipment

PWM Control & PWM/PFM Control High Frequency Step-Down Switching Regulator (DC/DC Converter ICs) S-8540/8541 Series

Description

The S-8540/8541 series is a family of CMOS step-down switching regulator (DC/DC Converter ICs) controllers with PWM control (S-8540) and PWM/PFM switchover control (S-8541). These devices consist of a reference voltage source, oscillation circuit, an error amplifier, phase compensation circuit, PWM control circuit, current limit circuit. A high efficiency and large current switching regulator (DC/DC Converter ICs) is realized with the help of small external components due to the high oscillation frequency, 300 kHz and 600 kHz.

The S-8540 provides low-ripple voltage, high efficiency, and excellent transient characteristics which come form the PMW control circuit capable of varying the duty ratio linearly from 0% to 100%, the optimized error amplifier, and the phase compensation circuit.

The S-8541 operates under PWM control when the duty ratio is 29% or higher and operates under PFM control when the duty ratio is less than 29% to ensure high efficiency over all load range.

These controllers serve as ideal main power supply units for portable devices due to the high oscillation frequencies together with the small 8-pin MSOP package.

Features

• Oscillation frequency

  600 kHz (A & B series), 300 kHz (C & D series)

• Output voltage

  1.5V to 6.0V in steps of 0.1V (A & C series)

• Output voltage precision

  ±2.0%

• Feed back type for output voltage (FB)

• External components

  a transistor, a coil, a diode, and capacitors.

• Built-in PWM/PFM switchover control circuit (S-8541)

  Duty ratio: 29% (PFM control),
  29 to 100% (PWM control)

• Current limit circuit

  Current is set by an external resistor RSENSE.

• Soft-start

  Time is set by an capacitor CSS and a resistor RSS.

• Shutdown function

• Lead-free products

Applications

• Power supplies for PDAs, electric organizers, and portable devices

• Power supplies for audio equipment such as portable CD players and headphone stereos

• Main or sub power supplies for notebook computers and peripheral equipment

Synchronous PWM Control Step-Down Switching Regulator (DC/DC Converter ICs) S-8533 Series

Description

The S-8533 series is a synchronous PWM control CMOS step-down switching regulator (DC/DC Converter ICs) controller that includes a reference voltage source, synchronous circuit, an oscillation circuit, an error amplifier, a phase compensation circuit, and a PWM controller.

An efficient step-down switching regulator (DC/DC Converter ICs) can be realized simply by adding external Pch and Nch power MOSFETs, one coil, and three capacitors.

Since the oscillation frequency is a high 300 kHz, the S-8533 can be used to configure a high efficiency step-down switching regulator (DC/DC Converter ICs) capable of driving high output current using small external components and a 3 to 10% in-crease in efficiency is obtained compared to conventional step-down switching regulators(DC/DC Converter ICs).

The 8-Pin TSSOP and high oscillation frequency make the S-8533 ideal as the main power supply for portable devices.

Features

• Synchronous rectification system realizing high efficiency (typ. 94%)

• External components

  Use at maximum duty = 100% and use of a battery up to maximum life is possible by using Pch and Nch MOS transistors externally.

• Oscillation frequency

  300 kHz

• Input voltage

  2.7 to 16.0 V

• Output voltage

  1.25 V, 1.3 to 6.0 V(Selectable in 0.1 V steps)

• Output voltage accuracy

  ±2.0%

• Soft start

  Can be set by an external capacitance CSS

• Shutdown function

• Lead-free products

Applications

• Constant voltage power supply for hard disks and DVD drivers

• Power supplies for portable devices, such as digital cameras, PDAs, electronic organizers, and cellular phones

• Main or sub power supply for notebook computers and peripheral equipment

• Constant voltage power supply for cameras, video equipment, and communication devices

Supply Voltage Divided Output, 5.5 V Input, 50 mA Synchronous Step-down switching Regulator with 260 nA Quiescent Current S-85S0P Series

Describe:

The S-85S0P Series introduces own distinctive low power consumption control and COT (Constant On-Time) control, features ultra low current consumption (260 nA quiescent current) and fast transient response, operates at PFM control. The S-85S0P Series realizes high efficiency in a wide range of load current consumption and provides strong support forextended period operation of mobile devices and wearable devices which are equipped with compact batteries. 

Features:

DC-DC converter block

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5%

• Fast transient response: COT control

• Input voltage: 2.2 V to 5.5 V

• Output voltage: 

 0.7 V to 2.5 V, in 0.05 V step

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy: 

±1.5% (1.0 V ≤ V_OUT ≤ 3.9 V) 

±15 mV (0.7 V ≤ V_OUT < 1.0 V)

• High side power MOS FET on-resistance: 420 mΩ

• Low side power MOS FET on-resistance: 320 mΩ

• Soft-start function: 1 ms typ.

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage)

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 300 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function: Hiccup control

• Input and output capacitors: Ceramic capacitor compatible

Supply voltage divider block

• Low current consumption: 280 nA typ.

• Input voltage: 1.5 V to 5.5 V

• Output voltage: 

 V_IN/2 (S-85S0PCxx)

 V_IN/3 (S-85S0PDxx)

Overall

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free

Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device

Supply Voltage Divided Output, 5.5 V Input, 200 mA Synchronous Step-down Switching Regulator with 260 nA Quiescent Current S-85S1P Series

Describe:

The S-85S1P Series introduces own distinctive low power consumption control and COT (Constant On-Time) control and features ultra low current consumption and fast transient response. PWM / PFM switching control automatically switches to PFM control when under light load, and the IC operates at ultra low current consumption of 260 nA quiescent current. The S-85S1P Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries. 

Features:

DC-DC converter block

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5%

• Fast transient response: COT control

• Input voltage: 2.2 V to 5.5 V

• Output voltage: 

 0.7 V to 2.5 V, in 0.05 V step

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy:

±1.5% (1.0 V ≤ VOUT ≤ 3.9 V) 

±15 mV (0.7 V ≤ VOUT < 1.0 V)

• Switching frequency: 1.0 MHz (at PWM operation)

• High side power MOS FET on-resistance: 420 mΩ

• Low side power MOS FET on-resistance: 320 mΩ

• Soft-start function: 1 ms typ.

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage)

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 450 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function:Hiccup control

• Input and output capacitors: Ceramic capacitor compatible

Supply voltage divider block

• Low current consumption: 280 nA typ.

• Input voltage: 1.5 V to 5.5 V

• Output voltage: 

 V_IN/2 (S-85S1PCxx)

 V_IN/3 (S-85S1PDxx)

Overall

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free

 Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device

5.5 V Input, 50 mA Synchronous Step-Down Switching Regulator with 260 nA Quiescent Current S-85S0A Series

Describe:

The S-85S0A Series introduces own distinctive low power consumption control and COT (Constant On-Time) control, features ultra low current consumption (260 nA quiescent current) and fast transient response, operates at PFM control. The S-85S0A Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries.

Features:

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5%

• Fast transient response: COT control

• Input voltage: 2.2 V to 5.5 V

• Output voltage: 0.7 V to 2.5 V, in 0.05 V stepr

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy: 

±1.5% (1.0 V ≤ VOUT ≤ 3.9 V)

±15 mV (0.7 V ≤ VOUT < 1.0 V)

• High side power MOS FET on-resistance: 420 mΩ

• Low side power MOS FET on-resistance: 320 mΩ

• Soft-start function: 1 ms typ.

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage)

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 300 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function:Hiccup control

• Input and output capacitors: Ceramic capacitor compatible

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free

Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device

5.5v Input, 200mA Synchronous Step-Down Switching Regulator with 260nA Quiescent Current S-85S1A Series

Describe:

The S-85S1A Series introduces own distinctive low power consumption control and COT (Constant On-Time) control and features ultra low current consumption and fast transient response. PWM / PFM switching control automatically switches to PFM control when under light load, and the IC operates at ultra low current consumption of 260 nA quiescent current. The S-85S1A Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries.

Features:

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5% 

• Fast transient response: COT control

• Input voltage: 2.2 V to 5.5 V 

• Output voltage: 0.7 V to 2.5 V, in 0.05 V step

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy: 

±1.5% (1.0 V ≤ V_OUT ≤ 3.9 V)

±15 mV (0.7 V ≤ V_OUT < 1.0 V)

• Switching frequency: 1.0 MHz (at PWM operation)

• High side power MOS FET on-resistance: 420 mΩ

• Low side power MOS FET on-resistance: 320 mΩ

• Soft-start function: 1 ms typ.

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage)

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 450 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function:Hiccup control

• Input and output capacitors: Ceramic capacitor compatible

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free

Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device

5.6 V Input, 50 mA, Low EMI, Synchronous Step-down Switching Regulator with 260 nA Quiescent Current S-85M0A Series (WLP product)

Describe:

The S-85M0A Series introduces own distinctive low power consumption control and COT (Constant On-Time) control, features ultra low current consumption (260 nA quiescent current) and fast transient response, operates at PFM control. The S-85M0A Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries.

Features:

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5%

• Fast transient response: COT control 

• Input voltage: 2.2 V to 5.6 V

• Output voltage: 

 0.7 V to 2.5 V, in 0.05 V step

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy: 

±1.5% (1.0 V ≤ V_OUT ≤ 3.9 V)

±15 mV (0.7 V ≤ V_OUT < 1.0 V)

• High side power MOS FET on-resistance: 360 mΩ

• Low side power MOS FET on-resistance: 250 mΩ

• Soft-start function: 1 ms typ.

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage)

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 300 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function: Hiccup control

• Discharge shunt function: 

 Unavailable (S-85M0A Series B type)

 Available (S-85M0A Series C type)

• Input and output capacitors: Ceramic capacitor compatible

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free, halogen-free

Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device

• GPS device

5.6 V Input, 200 mA, Low EMI, Synchronous Step-down Switching Regulator with 260 nA Quiescent Current S-85M1A Series (WLP product)

Describe:

The S-85M1A Series introduces own distinctive low power consumption control and COT (Constant On-Time) control and features ultra low current consumption and fast transient response. PWM / PFM switching control automatically switches to PFM control when under light load, and the IC operates at ultra low current consumption of 260 nA quiescent current. The S-85M1A Series realizes high efficiency in a wide range of load current consumption and provides strong support for extended period operation of mobile devices and wearable devices which are equipped with compact batteries.

Features:

• Ultra low current consumption: 260 nA quiescent current

• Efficiency (when under 100 μA load): 90.5%

• Fast transient response: COT control

• Input voltage: 2.2 V to 5.6 V

• Output voltage: 

 0.7 V to 2.5 V, in 0.05 V step

 2.6 V to 3.9 V, in 0.1 V step

• Output voltage accuracy: 

±1.5% (1.0 V ≤ V_OUT ≤ 3.9 V)

±15 mV (0.7 V ≤ V_OUT < 1.0 V)

• Switching frequency: 1.0 MHz (at PWM operation) 

• High side power MOS FET on-resistance: 360 mΩ

• Low side power MOS FET on-resistance: 250 mΩ

• Soft-start function: 1 ms typ. 

• Under voltage lockout function (UVLO): 1.8 V typ. (detection voltage) 

• Thermal shutdown function: 135°C typ. (detection temperature)

• Overcurrent protection function: 450 mA (at L = 2.2 μH)

• Automatic recovery type short-circuit protection function: Hiccup control 

• Discharge shunt function: 

 Unavailable (S-85M1A Series B type) 

 Available (S-85M1A Series C type) 

• Input and output capacitors: Ceramic capacitor compatible 

• Operation temperature range: Ta = −40°C to +85°C 

• Lead-free, halogen-free

Applications:

• Wearable device

• Bluetooth device

• Wireless sensor network device

• Healthcare equipment

• Smart meter

• Portable game device 

• GPS device

36V Input, 600 mA Synchronous Step-Down Switching Regulator S-8580AC/ S-8580AD/ S-8581AC/ S-8581AD Series

Describe:

The S-8580/8581 Series is a step-down switching regulator developed using high withstand voltage CMOS process technologies.

This IC has high maximum operation voltage of 36 V and maintains high-accuracy FB pin voltage at ±1.5%. As suitable packages for high-density mounting, such as small-sized HSNT-6(2025), are adopted, this IC contributes to miniaturization of electronic equipment.

PWM control (S-8580 Series) or PWM / PFM switching control (S-8581 Series) can be selected as an option.

Since the S-8581 Series, which features PWM / PFM switching control, operates with PWM control under heavy load and automatically switches to PFM control under light load, it achieves high-efficiency operation in accordance with the device’s status. Furthermore, our distinctive PWM / PFM switching control technology suppresses the ripple voltage to be generated in VOUT while PFM control is in operation.

Since the S-8580/8581 Series has the built-in synchronous circuit, it achieves high efficiency easier compared with conventional step-down switching regulators. In addition, it has the built-in overcurrent protection circuit which protects the IC and coils from excessive load current as well as a thermal shutdown circuit which prevents damage from heat generation.

Features:

• Input voltage: 4.0 V to 36.0 V 

• Output voltage (externally set): 2.5 V to 12.0 V for industrial equipment

• Output current: 600 mA 

• FB pin voltage accuracy: ±1.5% for home electric appliance

• Efficiency: 95%

• Oscillation frequency: 400 kHz typ.

• Overcurrent protection function: 1.2 A typ. (pulse-by-pulse method)

• Thermal shutdown function: 170°C typ. (detection temperature)

• Short-circuit protection function: Hiccup control, Latch control

• 100% duty cycle operation:

• Soft-start function: 5.8 ms typ.

• Under voltage lockout function (UVLO): 3.35 V typ. (detection voltage)

• Input and output capacitors: Ceramic capacitor compatible

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free 

 Applications:

• Constant-voltage power supply for industrial equipment

• Constant-voltage power supply for home electric appliance 

36V Input, 600 mA Synchronous Step-Down Switching Regulator S-8580AA/S-8580AB/S-8581AA/S-8581AB Series

Describe:

The S-8580/8581 Series is a step-down switching regulator developed using high withstand voltage CMOS process technologies.

This IC has high maximum operation voltage of 36 V and maintains high-accuracy FB pin voltage at ±1.5%. As suitable packages for high-density mounting, such as small-sized HSNT-6(2025), are adopted, this IC contributes to miniaturization of electronic equipment.

PWM control (S-8580 Series) or PWM / PFM switching control (S-8581 Series) can be selected as an option.

Since the S-8581 Series, which features PWM / PFM switching control, operates with PWM control under heavy load and automatically switches to PFM control under light load, it achieves high-efficiency operation in accordance with the device’s status. Furthermore, our distinctive PWM / PFM switching control technology suppresses the ripple voltage to be generated in VOUT while PFM control is in operation.

Since the S-8580/8581 Series has the built-in synchronous circuit, it achieves high efficiency easier compared with conventional step-down switching regulators. In addition, it has the built-in overcurrent protection circuit which protects the IC and coils from excessive load current as well as a thermal shutdown circuit which prevents damage from heat generation.

Features:

• Input voltage: 4.0 V to 36.0 V 

• Output voltage (externally set): 

 2.5 V to 30.0 V (S-8580 Series) for industrial equipment

 2.5 V to 12.0 V (S-8581 Series)

• Output current: 600 mA

• FB pin voltage accuracy: ±1.5% for home electric appliance

• Efficiency: 91%

• Oscillation frequency: 2.2 MHz typ.

• Overcurrent protection function: 1.2 A typ. (pulse-by-pulse method)

• Thermal shutdown function: 170°C typ. (detection temperature)

• Short-circuit protection function: Hiccup control, Latch control

• 100% duty cycle operation:

• Soft-start function: 5.8 ms typ.

• Under voltage lockout function (UVLO): 3.35 V typ. (detection voltage)

• Input and output capacitors: Ceramic capacitor compatible

• Operation temperature range: Ta = −40°C to +85°C

• Lead-free (Sn 100%), halogen-free

Applications:

• Constant-voltage power supply for industrial equipment 

• Constant-voltage power supply for home electric appliance