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adp2323 emi and snubber design

I am using the ADP2323 for one of our designs and i can see low amplitude spikes (10mVpp) at the switching frequency on some board outputs (on clock signals ). I was wondering if an RC snubber circuit at the output MOSFET could help reduce these spikes leaking into sensitive sections of the board.

I see that the ADP2323 evaluation board has provision for RC snubber (R6, C11 and R20, C14) but is not populated. Is there any reference for optimal RC values that can be calculated for APD2323 ? I would appreciate any inputs.