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TPS53625: PVNN double pulse issue

Part Number: TPS53625

Hello,

               We found the VCCPVNN transient out of intel spreadsheet spec on light & heavy load. And when we check phase node we found there has double pulse behavior.

 

We have change PR133 from 6.34k to 30 ohm for zero load line before.

Which part could we try to fine tune to improve transient & double pulse? Has any tuning suggestion? Thank you. 

Schematics

drive.google.com/.../view             

BR

Patrick