This part is a kind of semiconductor called ADP170.

Function of this product has (ADP170 / ADP171) CMOS Linear Regulators.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

300 mA, Low Quiescent Current, CMOS Linear Regulators ADP170/ADP171 FEATURES Maximum output current: 300 mA Input voltage range: 1.6 V to 3.6 V Low quiescent current IGND = 23 μA with 0 mA load IGND = 170 μA with 300 mA load Low shutdown current: <1 μA Low dropout voltage: 66 mV at 300 mA load Output voltage accuracy: ±1% Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V Adjustable-output voltage range 0.8 V to 3.0 V (ADP171) Accuracy over line, load, and temperature: ±3% Stable with small 1 μF ceramic output capacitor PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz Low noise: 30 μV rms at VOUT = 0.8 V Current limit and thermal overload protection Logic-controlled enable Compact 5-lead TSOT package TYPICAL APPLICATION CIRCUITS VIN C1 2 1 VIN VOUT 5 VOUT [ ... ]

ADP170 PDF Datasheet Download