This part is a kind of semiconductor called APW8825A.

Function of this product has 3A 5V 1MHz Synchronous Buck Converter.

Manufacturers : ANPEC

Image and pinout :

Some of the text within the PDF file :

APW8825A 3A 5V 1MHz Synchronous Buck Converter Features General Description • High Efficiency up to 95% APW8825A is a 3A synchronous buck converter with inte- - Automatic Skip/PWM Mode Operation grated 110mΩ high side and 80mΩ low side power • Adjustable Output Voltage from 0.6V to VIN MOSFETs. The APW8825A design with a current-mode control scheme, can convert wide input voltage of 2.6V to • Integrated 110mΩ High side 80mΩ Low Side 5.5V to the output voltage adjustable from 0.6V to 5.5V to MOSFET provide excellent output voltage regulation. • Low Dropout Operation : 100% Duty cycle The APW8825A is equipped with an automatic Skip/PWM • Stable with Low ESR Ceramic Capacitors mode operation. At light load, the IC operates in the Skip • Power-On-Reset Dete [ ... ]

APW8825A PDF Datasheet Download