Winbond / Nuvoton Technology Corporation America.
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Pin #1 is indicated by a chamfered edge on the top-left corner of the package, next to a laser-marked dot. On the PCB, Pin #1 is at the corner nearest to the inductor (usually L5 or L6 on laptop boards). Winbond / Nuvoton Technology Corporation America
For engineers or technicians needing precise pinouts or circuit diagrams, verified documentation can be found through authorized electronic component distributors: Ariat Tech: Provides detailed stock info and PDF downloads. wpce773la0dg datasheet pdf verified