[FAQ] LM5175: MosFET Margin VDS

Prodigy 70 points

Replies: 3

Views: 56

Part Number: LM5175

Can i using 40V VDS MOSFET in LM5175 when input 32V output 12V?

If no, how to calculate the safe voltage?

Thank You

3 Replies

  • Hello Minki,

    What is the maximum input voltage? What happens during transients?

    I would recommend to at least stay 30% above the maximum input voltage including the overshoots that might happen during transients.

    Best regards,
    Brigitte

    For more information on buck-boost devices have a look at www.ti.com/buckboost

  • In reply to Brigitte:

    Dear Brigitte:

    Input is 32V DC,and the RDSon and price of 40V and 60V MOSFET had some different....so find can it safe to use 40Vds MOSFET when 32V input

    Thank You

  • In reply to Minki Li1:

    Hello Minki,

    What is the accuracy of the 32V DC input?

    I would not use 40V MOSFETs for a 32V input, but it is your decision how much margin you need in your system.

    Best regards,
    Brigitte

    For more information on buck-boost devices have a look at www.ti.com/buckboost