This part is a kind of semiconductor called NB669.

Function of this product has 24V High Current Synchronous Buck Converter.

Manufacturers : MPS

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Some of the text within the PDF file :

NB669 24V, High Current Synchronous Buck Converter With LDO The Future of Analog IC Technology DESCRIPTION The NB669 is a fully integrated hig h frequen cy synchronous rectified step-d own s witch mode converter with 5V fixed output voltage. It o ffers very compact solution to achieve 6A continuous output current and 9A peak output current over a wide inpu t supply ra nge with e xcellent loa d and line regulation. The NB669 operates at high efficiency over a wide output current load range. Constant-On-Time (COT ) co ntrol mode provides fast transient response and eases loop stabilization. Under voltage lockout is internally set as 4.15 V. An open drain po wer good signal indicates the output is within its nominal voltage range. NB669 also p rovides a 5V LDO, which can be used to power the [ ... ]

NB669 PDF Datasheet Download