This part is a kind of semiconductor called L4960H.

Function of this product has 2.5A POWER SWITCHING REGULATOR.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® L4960 2.5A POWER SWITCHING REGULATOR 2.5A OUTPUT CURRENT 5.1V TO 40V OPUTPUT VOLTAGE RANGE PRECISE (± 2%) ON-CHIP REFERENCE HIGH SWITCHING FREQUENCY VERY HIGH EFFICIENCY (UP TO 90%) VERY FEW EXTERNAL COMPONENTS SOFT START INTERNAL LIMITING CURRENT THERMAL SHUTDOWN HEPTAWATT ORDERING NUMBERS: L4960 (Vertical) L4960H (Horizontal) DESCRIPTION The L4960 is a monolithic power switching regulator delivering 2.5A at a voltage variable from 5V to 40V in step down configuration. Features of the device include current limiting, soft start, thermal protection and 0 to 100% duty cycle for continuous operation mode. The L4960 is mounted in a Heptawattplastic power package and requires very few external components. Efficient operation at switching frequencies up to 150KHz allows a reduction in [ ... ]

L4960H PDF Datasheet Download