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TPS54560: The problem of loud ripple noise

Part Number: TPS54560


I used TPS54560 test, measured the ripple is very large, at 700mV.

Vin 15-30V, inductively selected 22uH, no-load test, 50mA. The attachment is the schematic diagram and PCB cloth board.

Please help to suggest what the problem is, many thanks~

Design schematic and pcb cloth board.docx