BUY APM4546 https://www.utsource.net/itm/p/1865558.html
Dual Enhancement Mode MOSFET (N-and P-Channel)
Description: APM4546 is a low dropout voltage regulator with a maximum output current of 500mA. Features: * Low dropout voltage: 0.4V (typical) * Output voltage accuracy: ±2% * Output current: 500mA * Thermal shutdown protection * Over-current protection Applications: * Battery-powered systems * Automotive electronics * Portable consumer electronics * Industrial applications (For reference only)