BUY AP89341 https://www.utsource.net/itm/p/504733.html
Standard CMOS process
Description: AP89341 is a high-performance, low-power, low-noise, low-dropout linear regulator. Features: Input voltage range: 2.7V to 5.5V Output voltage range: 0.8V to 4.2V High efficiency: up to 95% Low quiescent current: 10uA Low dropout voltage: 200mV Low noise: 50uVrms Output current: up to 1A High PSRR: 80dB Thermal shutdown protection Short-circuit protection Over-current protection Application: AP89341 is suitable for applications such as mobile phones, tablets, digital cameras, and other portable devices. (For reference only)