This part is a kind of semiconductor called APL1117.

Function of this product has 1A Low Dropout Fast Response Positive Adjustable Regulator.

Manufacturers : Anpec Electronics

Image and pinout :

Some of the text within the PDF file :

APL1117 1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 1.8V, 2.5V, 2.85V and 3.3V Features • • • • • • • • • • Guaranteed Output Voltage Accuracy within 2% Fast Transient Response Guaranteed Dropout Voltage at Multiple Currents Load Regulation : 0.1% Typ. Line Regulation : 0.03% Typ. Low Dropout Voltage : 1.1V Typ. at IOUT =1A Current Limit : 1A Typ. at TJ=25°C On-Chip Thermal Limiting : 150°C Typ. Adjustable Output : 1.25~10.7V Standard 3-pin TO-220, TO-252, TO-263 and SOT-223 Power Packages General Description The APL1117 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applicat [ ... ]

APL1117 PDF Datasheet Download