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How to generate -21.5V if I only have 5V power rail

Roy Chou1
Genius 13905 points
Other Parts Discussed in Thread: PMP15012, LMR16020

Hi team,

Could you suggest me the total solution to generate output -21.5V/-0.5A if I only have 5V power rail?

Roy

  • 0
    TI__Guru 74410 points

    Hi Roy,

    You need to consider a buck controller/converter in the inverting buck-boost configuration. Please reach out to BSR group, and also referring to something like PMP15012.

    Thanks,

    Youhao Xi, BCS Applications Engineering

  • 0 in reply to Youhao Xi
    TI__Genius 13905 points

    Hi Youhao,

    I think PMP15012 may help me. Our desire spec is 21.5V/0.5A and 5V in input. 

    But I couldn't see the design procedure in APP note. Could you let me know if we have corresponding design procedure? Thank you.

    Regards,

    Roy

  • 0 in reply to Roy Chou1
    TI__Guru 74410 points

    Please contact the buck group, or create a new post with the LMR16020 in the subject, then your question will be forwarded to the right engineer.

    We are boost and buck boost group and sorry I do not know the engineer who is responsible for LMR16020.

    Thanks,

    Youhao