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TPS51285B: Abnormal noise at some current loading...

Part Number: TPS51285B

Dear SIrs,

My customer is testing with TPS51285B and found some issue about the noise.

Below is the testing result!

while the output loading is around 3~5A, the noise seems large than others current loading.

Please help to check the attached schematics and give me some suggestion.

Thanks. 

4745.SCH.pdf