This part is a kind of semiconductor called AIC1746.

Function of this product has 150mA Linear Regulator.

Manufacturers : Analog Intergrations Corporation

Image and pinout :

Some of the text within the PDF file :

AIC1746 „ FEATURES 150mA Linear Regulator With Bypass Pin „ DESCRIPTION z Guarantee 150mA Output Current. z Fast Response in Line/Load Transient. z Wide Operating Voltage Ranges: 2.0V to 6.0V. z 0.01μA Shutdown Standby Current. z Low Quiescent Current：80µA. z Output Voltage available within 1.1~4.2V. z Low Dropout：140mV at 150mA. z PSRR：60dB at 1kHz. z Fixed: 1.1, 1.2, 1.3, 1.5, 1.8, 2.5, 2.7, 2.8, 2.85, 3.0, 3.3, 3.5, 3.7, 3.8 Output Voltage. z Current Limit and Thermal Protection. z Available in ±2% Output Tolerance. z Available in 3 & 5 lead of SOT-23, TSOT23, SC70, & SOT-89 & DFN 6L 2x2 Package. „ APPLICATIONS z Cellular Phones. z PCMCIA Cards z Laptop, Palmtops, Notebook Computers z Personal Communication Equipment. z PDAs. z Digital Still Cameras. z Portable Consumer E [ ... ]

AIC1746 PDF Datasheet Download