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TPS746-Q1: Power off delay time

Daniel Wang (auto)
Expert 3540 points
Part Number: TPS746-Q1

Tool/software:

Hello team,

Customer need power-off delay time from disable to Vout shut down, there is waveform for power-up sequence in datasheet, but no such waveform or parameter for power-off progress, can you support it?

Thanks!

  • 0
    TI__Mastermind 37065 points

    Hi Daniel,

    When the LDO is disabled using the EN pin, the LDO stops regulating Vout nearly instantaneously.  When we measure this in modern LDO's the time delay is usually measured in units of nanoseconds.  The time it takes Vout to settle to 0V is dependent on Cout and how much leakage is on the output to discharge Cout.

    Thanks,

    Stephen