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TPS63021: EMI issue with peak radiation observed at 318MHz

Part Number: TPS63021

Hi Team,

We are using TPS63021 buck boost regulator in one of our design to generate 3.3V from 3V/5V. During FCC Part 15C testing, we observed peak radiation at 318MHz. After isolating the above said regulator we were able to resolve this peak.

Please find the below images for schematic and respective Layout reference. Appreciate your inputs to resolve the issue.

Warm Regards,