This part is a kind of semiconductor called INN9182.

Function of this product has 2.3-A Synchronous Step-Down Converter.

Manufacturers : INNOTECH

Image and pinout :

Some of the text within the PDF file :

INNOTECH vodasat@gmail.com 13510327305 INN9182 4.3V to 23V Input, 2.3-ASynchronous Step-Down Converter with Fast Transient Response For details, check for samples: INN9182 Features Applications y W-mode™® Gm Curvature Enables Fast Transient Response y 2.3-A Output Current y High Efficient Integrated FETs Optimized for portable application: 95mΩ (High side) and 90mΩ (Low side) y High Efficiency Up to 96% Efficiency @ 5V Input, 3.3V Output Up to 94% efficiency @ 12V Input, 3.3V Output y Wide Input Voltage Ran [ ... ]

INN9182 PDF Datasheet Download