BUY BD9241F https://www.utsource.net/itm/p/8969321.html

Description: The BD9241F is a high-performance, high-efficiency, high-frequency DC/DC converter with a built-in PWM controller. Features: High efficiency: up to 95% Low output voltage ripple Low standby current Low start-up current Built-in soft-start circuit Over-current protection Over-temperature protection Short-circuit protection Applications: Portable devices Battery-powered equipment Automotive applications Industrial equipment LED lighting (For reference only)