This part is a kind of semiconductor called A7986A.

Function of this product has 3A step-down switching regulator.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

A7986A 3 A step-down switching regulator for automotive applications Datasheet - production data Applications  Dedicated to automotive applications  Automotive LED driving HSOP8 exposed pad Features  Qualified following AEC-Q100 requirements  3 A DC output current  4.5 V to 38 V input voltage  Output voltage adjustable from 0.6 V  250 kHz switching frequency, programmable up to 1 MHz  Internal soft-start and enable  Low dropout operation: 100% duty cycle  Voltage feed-forward  Zero load current operation  Overcurrent and thermal protection  HSOP8 package Description The A7986A is a step-down switching regulator with a 3.7 A (min.) current limited embedded Power MOSFET, so it is able to deliver up to 3 A current to the load depending on the applic [ ... ]

A7986A PDF Datasheet Download