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LM26420-Q1: When EN1/EN2 goes Low, how about PG1/PG2?

Masatoshi Oguri
Expert 4780 points
Part Number: LM26420-Q1

Hello,

When EN1/EN2 goes Low, what behavior is expected for PG1/PG2? If the Vout is still high enough, will PG1/PG2 keep high even if EN1/EN2=Low? Ot will it be Low immediately when EN1/EN2 goes Low regardless of FB1/FB2 voltage? 

Thank you.

Regards,

Oguri (TIJ automotive FAE)

  • +1
    TI__Expert 7585 points

    Hi Oguri,

    Thanks for your question.

    According the block diagram present at page 13 of the device datasheet, the PG pin should be only dependent on the FB value (as long as VIN is supplied).

    If your customer is interested in a dual automotive Buck I would recommend to take a look at the new TPS6244x-Q1 family.

    Please ask again if you have any further questions.

    Thanks,

    Stefano