BUY BIT3251 https://www.utsource.net/itm/p/11527065.html

Description: The BIT3251 is a low-voltage, low-power, low-dropout (LDO) linear regulator with a maximum output current of 500mA. Features: Low dropout voltage: 0.4V (typical) Low quiescent current: 10μA (typical) Output voltage accuracy: ±2% Output voltage range: 1.2V to 5.0V Over-current protection Thermal shutdown protection Short-circuit protection High PSRR: 70dB (typical) Applications: Battery-powered systems Portable devices Wearable devices Automotive systems Industrial systems Medical systems (For reference only)