This part is a kind of semiconductor called UP6182.
Function of this product has Dual Synchronous Buck Controller.
Manufacturers : uPI Semiconductor
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uP6182 Dual Synchronous Buck Controller with 5V/3.3V 100mA LDOs for Notebook System Power General Description The uP6182 is a dual synchronous buck controller with 5V/3.3V 100mA LDOs for notebook system power supply solution. A 250kHz VCLK output can be used for external charge pump to generate gate drive voltage for load switches. The uP6182 supports high efficiency, fast transient response and a combined power-good signal. The out of audio mode maintains the switching frequency above audio frequency, which eliminates noise in audio applications. The adaptive on-time control provides a convenient and efficient operation. The uP6182 has internal soft-start to control the inrush current. The soft-stop feature avoids negative output voltage for undervoltage protection, overcurrent protection [ ... ]