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TPS53353: HARDWARE ISSUE

Part Number: TPS53353

We have interfaced TPS53353 in one of the ethernet design for generating 1V @15 amp output. Providing Vin of 3.3V and VDD of 9V (variable) we are getting different voltages (above 6V) in Vreg pin and output of 1.7V instead of 1V. It is varying with VDD power. Tried with two devices and same issue.

Enclosing herewith circuit for your consideration.

Please suggest.