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TPS55330: The ripple noise becomes larger when the load is applied

Bing Zhao
Prodigy 60 points
Part Number: TPS55330

Tool/software:

Hi team

I buil the circuit with the SEPIC configuration by TPS55330.

Ripple noise increases after loading ，and  increases as the load increases

0.5A

1A

The burrs that appear should be generated on the corresponding switch edge. How to explain this phenomenon after loading and how to optimize it? I tried to increase the inductance to 10uH, which was effective but not significant. Looking forward to TI's engineer 's answer.

Thanks