This part is a kind of semiconductor called L6728H.

Function of this product has Single-phase Switching DC-DC Controllers & Smart Regulators.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

L6728H Single phase PWM controller with Power Good Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Flexible power supply from 5 V to 12 V Power conversion input as low as 1.5 V 0.8 V internal reference 0.8% output voltage accuracy High-current integrated drivers Power Good output Sensorless and programmable OCP across low-side RDS(on) OV / UV protections VSEN disconnection protection Oscillator internally fixed at 300 kHz LSless to manage pre-bias start-up Adjustable output voltage Disable function Internal soft-start DFN10 package DFN10 Description L6728H is a single-phase step-down controller with integrated high-current drivers that provides complete control logic and protection to realize in a simple way general DC-DC converters by using a co [ ... ]

L6728H PDF Datasheet Download