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TPS54225: Output volage is not normal

Part Number: TPS54225

Dear TI Experts

I am now using TPS54225,12V to 5V,2A

When power on, the output voltage is 9V and then be pulled down immediately~

   we have done many experiments: changed the Inductor 、add output Capacitance、use DC power supply, but nothing makes sense, Can you give me any suggestions ?Thank you very much~

Here is the output wave and the SCH(the same as wenbench)