This part is a kind of semiconductor called EC50117ABG.

Function of this product has 1A Positive Voltage Regulators.

Manufacturers : E-CMOS

Image and pinout :

Some of the text within the PDF file :

EC50117 1A Positive Voltage Regulators Introduction The EC50117 series of high performance low dropout voltage regulators are designed for applications that require efficient conversion and fast transient response. Features z z z z z z z Low Dropout Performance Guaranteed 1A Output Current Wide Input Supply Voltage Range Over-temperature and Over-current Protection Fixed or Adjustable Output Voltage Rugged 2KV ESD withstand capability Available in SOT-223 & TO-252 & SOT-89 Packages Applications z z z z Active SCSI Terminators High Efficiency Linear Regulators 5V to 3.3V Linear Regulators Motherboard Clock Supplies Pin Configuration (TOP-VIEW) Package: SOT-223 Package: SOT-223 (B1) Package: TO-252 Package: SOT-89 E-CMOS Corp. (www.ecmos.com.tw) Page 1 of 10 2007/09/17 EC50117 1A Po [ ... ]

EC50117ABG PDF Datasheet Download