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

Roy Chou1

Genius 16210 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

over 5 years ago

0 Youhao Xi over 5 years ago

TI__Guru* 78440 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 Roy Chou1 over 5 years ago in reply to Youhao Xi

TI__Genius 16210 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 Youhao Xi over 5 years ago in reply to Roy Chou1

TI__Guru* 78440 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

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