This part is a kind of semiconductor called AOZ1073.

Function of this product has 3A Synchronous Buck Regulator.

Manufacturers : Alpha & Omega Semiconductors

Image and pinout :

Some of the text within the PDF file :

AOZ1073 EZBuck™ 3A Synchronous Buck Regulator General Description The AOZ1073 is a synchronous high efficiency, simple to use, 3A buck regulator. The AOZ1073 works from a 4.5V to 16V input voltage range, and provides up to 3A of continuous output current with an output voltage adjustable down to 0.8V. The AOZ1073 comes in an SO-8 packages and is rated over a -40°C to +85°C ambient temperature range. Features ● 4.5V to 16V operating input voltage range ● Synchronous rectification: 85mΩ internal high-side switch and 30mΩ Internal low-side switch ● High efficiency: up to 95% ● Internal soft start ● Output voltage adjustable to 0.8V ● 3A continuous output current ● Fixed 500kHz PWM operation ● Cycle-by-cycle current limit ● Pre-bias start-up ● Short-circuit pro [ ... ]

AOZ1073 PDF Datasheet Download