This part is a kind of semiconductor called APW7120A.

Function of this product has Synchronous Buck PWM Controller.

Manufacturers : Anpec Electronics Coropration

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Some of the text within the PDF file :

APW7120A 5V to 12V Supply Voltage, 8-PIN, Synchronous Buck PWM Controller Features • • • Operating with Single 5~12V Supply Voltage or two Supply Voltages Drive Dual Low Cost N-Channel MOSFETs - Adaptive Shoot-Through Protection Built-in Feedback Compensation - Voltage-Mode PWM Control - 0~100% Duty Ratio - Fast Transient Response General Description The APW7120A is a fixed 300kHz frequency, voltage mode, and synchronous PWM controller. The device drives two low cost N-channel MOSFETs and is designed to work with single 5~12V or two supply voltage(s), providing excellent regulation for load transients. The APW7120A integrates controls, monitoring and protection functions into a single 8-pin package to provide a low cost and perfect power solution. A power-on-re [ ... ]

APW7120A PDF Datasheet Download