This part is a kind of semiconductor called APL1117D.

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 :

APL1117D/R 1A, Low Dropout Fast Response Positive Regulator Fixed 3.3V and 5.0V 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 : 1.2V Typ. at IOUT =0.8A Current Limit : 1A Typ. at TJ=125 °C On-Chip Thermal Limiting : 150 °C Typ. Standard 3-pin SOT-223 and TO-252 Power Packages General Description The APL1117D/R is a low dropout three-terminal fixed 3.3V and 5.0V regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL1117D/R has been optimized. The dropout volt [ ... ]

APL1117D PDF Datasheet Download