This part is a kind of semiconductor called AME8805MEFT.

Function of this product has 600mA CMOS LDO.

Manufacturers : Analog Microelectronics

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Some of the text within the PDF file :

AME, Inc. AME8805 / 8810 600mA CMOS LDO n General Description The AME8805/8810 family of positive, linear regulators feature low quiescent current (30µA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-89 and SOT-223 packages are attractive for "Pocket" and "Hand Held" applications. These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under the "Worst" of operating conditions. The AME8805/8810 is stable with an output capacitance of 2.2µF or greater. n Functional Block Diagram IN OUT Overcurrent Shutdown Thermal Shutdown R1 AMP Vref=1.215V R2 GND n Features l l l l l l l Very Low Dropout Voltage Guaranteed 600mA Output Accurate to within 1.5% 30µA Quiescent Current Over-Temperature Shutd [ ... ]

AME8805MEFT PDF Datasheet Download