BUY M4T28BR12SH1 https://www.utsource.net/itm/p/127918.html
TIMEKEEPER SNAPHAT Battery & Crystal
Description: The M4T28BR12SH1 is a 4-pin voltage regulator manufactured by STMicroelectronics, specifically designed to provide a stable 5V DC output. Features: Input voltage range from 4.1V to 14V Output voltage 5V ± 1% Output current of up to 300mA Low Quiescent current Reverse battery protection Thermal shutdown High PSRR Low dropout voltage (typically 0.2V at 100mA) Applications: Portable battery-powered devices Automotive systems Industrial equipments Consumer electronics Motor drivers Backup power supplies (For reference only)