TPS54527: minimum On time

Kazuhiko Hirano

Part Number: TPS54527

Hello,

TPS54527 does not have minimum on time spec?
Does TPS54527 work even Vin=18V and Vout=0.76V?

Best regards,

K.Hirano

ano

over 3 years ago

0 Amod Vaze over 3 years ago

TI__Mastermind 26830 points

Hi K. Hirano,

TPS54527 does have a typical 150ns min on-time specification. Most likely the min on-time pulse will be delivered following an increased off-time which will try to maintain the regulation at 0.76V. This will result in lowering of switching frequency. Let me double check with design on this as I do not have a EVM handy to test on bench.

Thanks,

Amod

0 Kazuhiko Hirano over 3 years ago in reply to Amod Vaze

TI__Genius 15138 points

Amod,

Thank you for your response.
I look forward to receiving feedback from design.

Best regards,

K.Hirano

0 Amod Vaze over 3 years ago in reply to Kazuhiko Hirano

TI__Mastermind 26830 points

Hi K.Hirano,

I confirmed with design team this condition of 18V to 0.76V should not be an issue. As I explained before, if min on-time pulse is delivered, off-time increases to regulate the VOUT.

Thanks,

Amod

0 Kazuhiko Hirano over 3 years ago in reply to Amod Vaze

TI__Genius 15138 points

Amod,

Thank you very much for your confirmation!

Best regards,

K.Hirano

0 Shuai Fan over 3 years ago in reply to Kazuhiko Hirano

TI__Genius 13451 points

Thanks for your feedback. We'll close this ticket.

Shuai

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TPS54527: minimum On time