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CSD87381P: Snubber circuit

Part Number: CSD87381P


I would like to set Snubber circuit.

I understand user should check the affection by changing Rsnb and Csnb but I would like to know start point.

I guess below calculation may be useful.

-  Csnb = 2Cp
-  Rsnb = Vs / Is= Vout / Iout

Q1) Could you please let me know Cp in Low side of CSD87381P?
Q2) Is there recommend calculation for snubber circuit?

The system is 
- VIN = 12V
- VOUT = 0.85V
- IOUT = 10A


  • Nagata san,

    Thanks for your interest in our FETs.

    Q1) Cp in the MOSFET datasheet is known as Coss, please see fig 16 in the CSD87381P datasheet for th elow side or sync FET.

    Q2) I found this article on this e2e forum that talks about snubber design for buck converters here: