This part is a kind of semiconductor called AP34063.

Function of this product has UNIVERSAL DC/DC CONVERTER.

Manufacturers : Diodes Incorporated

Image and pinout :

Some of the text within the PDF file :

AP34063 UNIVERSAL DC/DC CONVERTER Description The AP34063 Series is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This series is specifically designed for incorporating in Step-Down and Step-Up and VoltageInverting applications with a minimum number of external components. Pin Assignments Switch Collector 1 Switch Emitter 2 Timing Capacitor 3 Gnd 4 SO-8 ( Top View ) 8 Driver 7 I pk Sense 6 VCC Collector 5 Comparator Inverting Input Features • Operation from 3.0V to 40V Input • Low Standby Current • Current Limiting • Output [ ... ]

AP34063 PDF Datasheet Download