View ap1722a-series datasheet:

AP1722A Series Anwell Semiconductor Corp. 4- Low 300mA Linear Regulator Features General Description The AP1722A is a 4-Low (Low-dropout, Low-noise, Operating Voltages Range：+2.2V to +7.0V Low-quiescent current, Low-cost) linear regulator that operations in the input voltage range from Output Voltages Range：+1.2V to +5.0V with +2.2V to +7.0V and delivers 300mA output current. 100mV Increment The high-accuracy output voltage is preset at an Maximum Output Current：300 mA internally trimmed voltage 2.5V or 3.3V. Other output Low Dropout: 125mV @ 100mA voltages can be mask-optioned from 1.2V to 5.0V with 100mV increment, except AP1722A-LL which (VOUT≧2.0 V) has 2.85V output voltage. ±2% Output Voltage Accuracy (special ±1% The AP1722A con