This part is a kind of semiconductor called AP2172A.

Function of this product has 1.0A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH.

Manufacturers : Diodes

Image and pinout :

Some of the text within the PDF file :

AP2162A/AP2172A 1.0A DUAL CHANNEL CURRENT-LIMITED POWER SWITCH WITH OUTPUT DISCHARGE Description The AP2162A and AP2172A are dual channel current-limited integrated high-side power switches optimized for Universal Serial Bus (USB) and other hot-swap applications. The family of devices complies with USB standards and available with both polarities of Enable input. The devices have fast short-circuit response time for improved overall system robustness, and have integrated output discharge function to ensure completely controlled discharging of the output voltage capacitor. They provide a complete protection solution for application subject to heavy capacitive loads and the prospect of short circuit, and offer reverse current blocking, over-current, over-temperature and short-circuit protect [ ... ]

AP2172A PDF Datasheet Download