Alpha and Omega Semiconductor AON6554 datasheet, a 441 KB PDF. Like other AON-series devices it is a power MOSFET in a DFN 5x6 footprint used in synchronous buck stages on motherboards and graphics cards. Inside you will find pin functions, voltage and current ratings, gate charge and on-resistance figures. These help locate drain and switch node pads when probing for a short and allow comparison with alternative parts. Verify the top marking and package before soldering in any substitute.
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