This part is a kind of semiconductor called AME8827.

Function of this product has Low Dropout 1A CMOS Regulator.

Manufacturers : Analog Microelectronics

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Some of the text within the PDF file :

AME AME8827 Low Dropout 1A CMOS Regulator n General Description The AME8827 family of positive, CMOS linear regulators and provide low dropout voltage (340mV @ 1A) and excellent PSRR, thus making them ideal for power-saving systems. These rugged devices have both Thermal Shutdown, and Current limit to prevent device failure under the "Worst" of operating conditions. The AME8827 is stable with an output capacitance of 4.7µF or larger. n Typical Application VIN C1 1µF AME8827 IN OUT EN GND VOUT C2 4.7µF n Features l Low Dropout Voltage:340mV @ 1A l Guaranteed 1A Drive current l Over-Temperature Shutdown l Current Limiting protection l Excellent PSRR : 60dB(typ.) l Factory Pre-set Output Voltages l Low Temperature Coefficient l Input Voltage Range (2.5V - 5.5V) l Output Voltage Ran [ ... ]

AME8827 PDF Datasheet Download