This part is a kind of semiconductor called RT8206B.

Function of this product has (RT8206A/B) Main Power Supply Controllers.

Manufacturers : Richtek

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Some of the text within the PDF file :

RT8206A/B High-Efficiency, Main Power Supply Controllers for Notebook Computers General Description The RT8206A/B dual step-down, switch-mode powersupply (SMPS) controller generates logic-supply voltages in battery-powered systems. The RT8206A/B includes two pulse-width modulation (PWM) controllers fixed at 5V/ 3.3V or adjustable from 2V to 5.5V. An optional external charge pump can be monitored through SECFB (RT8206A). This device also features a linear regulator providing a fixed 5V output. The linear regulator provides up to 70mA output current with automatic linear-regulator bootstrapping to the BYP input. The RT8206A/B includes on-board power-up sequencing, the power-good outputs, internal soft-start, and internal soft-discharge output that prevents negative voltages on shutdown. A co [ ... ]

RT8206B PDF Datasheet Download