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LM20125: Capacitances changes.

Jason Lee
Prodigy 10 points
Part Number: LM20125


Our engineer designed the circuit for the DC-DC converter based on the datasheet, but they're planning to modify the input and output capacitor values from those specified in the datasheet. I’ve marked the changes in red boxes — please review and let me know if these values are acceptable. 

LM20125MH.pdf 

  • 0
    TI__Mastermind 24270 points

    Hello Jason,

    thanks for reaching out in E2E.

    For the LM202125 circuits in the schematic I only see capacitors at the SW nodes marked in red. Is this really the intended change? I would not expect to have a cap at the SW node. Probably it was intended in parallel to the output cap. Please double-check.

    If a Snubber circuit was intended, then it needs some damping resistor in series. The following application note is providing more details: "Controlling the Switch-node Ringing of Synchronous Buck Converters".

    Please let me know your feedback.

    Best regards,

    Andreas.