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TPSM53604: TPSM53604

user5951090
Prodigy 90 points
Part Number: TPSM53604
Other Parts Discussed in Thread: LM73605, LMZM33606, LMZM33606EVM

Based on start up waveform in tpsm53604 datasheet, delay between PG high and Vout Ok is around 3ms, pls provide detail value for this delay time.

  • 0
    TI__Guru 50120 points

    Hi,

    Let me look into this with the team to see if there are any specs to quantify this delay time between VOUT being 94% and when PGOOD pulls high.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Guru 50120 points

    Hi,

    What specific details were you looking for with this? 

    Attached is an image from the validation team for a 12Vin/5Vout @3A:

    As you pointed out the delay time of PG asserting high is roughly 3ms which appears typical here. I would expect the TPSM53604 to perform like this straight out of box.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    Prodigy 90 points

    Hi Jimmy, 

    we have a sequence requirement, we use PG of TPSM53604 to enable next rail, and next rail need output OK in 5ms after TPSM53604's Vo ready.

    It seems TPSM53604 can not meet this requirement.

    Do you have any suggestion to meet our requirement with this long delay time?

  • 0 in reply to user5951090
    TI__Guru 50120 points

    Hi,

    Just wanted to clarify that the PG signal is to show when the VOUT output is within nominal range. When the PG signal goes high is when the "Vo is ready" is how I would interpret this signal. However if this still does not meet your requirement, what is  your input/output and loading requirements? 

    Perhaps I can find an alternative power module that can meet your needs.

    Regards,

    Jimmy

  • 0 in reply to Jimmy Hua
    TI__Guru 50120 points

    Perhaps you can look at the LMZM33606 which integrates the LM73605 converter. Figure 67 shows a typical soft-start sequence. The delay time looks roughly half a division which comes out to around 1ms. There will be some additional delay glitch time of around 140us. 

    It may make sense to get a LMZM33606EVM and prototype to your application needs to evaluate the part.