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TPS54360: The chip damage

Part Number: TPS54360

Hi team:

     we use TPS54360 in design as below:

    We have been using this design in mature products for three or four years。There have been occasional reports of TPS54360 burn out over the past few years。But from March 2021 , there is a large number of TPS54360 damaged。We test damaged chips,Pin 2 and Pin 8 are short circuit to Pin 7。we change the damaged TPS54360 to new chip,the board works fine。 What exactly went wrong?

best regards!