Describes：

This IC is a secondary step-down switching regulator developed using CMOS process technologies with a built-in Power Good function. PWM control (S-19954 Series) or PWM / PFM switching control (S-19955 Series) can be selected as an option.

S-19954 Series, which features PWM control, can be used without interfering with AM radio bands.

Since the S-19955 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.

This IC is implemented as a small package and can comprise an application circuit with an inductor and two capacitors at the minimum configuration. Since the switching frequency is as high as 2.25 MHz, and the peripheral parts can be made compact, the IC is suitable for space-saving uses. 

Applications：

• Secondary power supply for automotive

• Camera module

• For automotive use (engine, transmission, ABS, related-devices for EV / HEV / PHEV, etc.)

• Constant-voltage power supply for (detection temperature) electrical application for vehicle interior