BUY TS321ITL https://www.utsource.net/itm/p/8938948.html
operational amplifier TS321ITL SOT-153 marking K401
Description: Low-Power, Low-Dropout, CMOS Voltage Regulator Features: Low quiescent current: 20 μA (typical) Low dropout voltage: 200 mV (typical) Output voltage accuracy: ±2% Output current: 500 mA Over-temperature protection Over-current protection Short-circuit protection Thermal shutdown Output voltage range: 1.2V to 6.0V Application: Battery-powered systems Portable electronics Automotive applications Telecom systems Industrial systems Consumer electronics (For reference only)