This part is a kind of semiconductor called AZ1117.

Function of this product has 1A LOW DROPOUT LINEAR REGULATOR.

Manufacturers : BCD Semiconductor

Image and pinout :

Some of the text within the PDF file :

Data Sheet 1A LOW DROPOUT LINEAR REGULATOR CURRENT MODE PWM CONTROLLER General Description The AZ1117 is a series of low dropout three-terminal regulators with a dropout of 1.15V at 1A output current. The AZ1117 series provides current limiting and thermal shutdown. Its circuit includes a trimmed bandgap reference to assure output voltage accuracy to be within 1% for 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, 5.0V and adjustable versions or 2% for 1.2V version. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal shutdown provides protection against any combination of overload and ambient temperature that would create excessive junction temperature. The AZ1117 has an adjustable version, that can provide the output voltage from 1.25V to 12V w [ ... ]

AZ1117 PDF Datasheet Download