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Original question:

LM7310: Unexpected Latch-off condition

LM7310: lm7310-unexpected-latch-off-condition

Christoph Gamauf
Prodigy 30 points
Part Number: LM7310

Tool/software:

Hey,

we see on our design more or less the same behaviour as in this post:

e2e.ti.com/.../lm7310-unexpected-latch-off-condition

Was there a solution to fix the unexpected-latch-off-condition?

Thanks

  • 0
    TI__Mastermind 23795 points

    Hi Christoph,

    I am looking into this. I did not handle that case so please give me some time. I will get information from my colleague regarding the old case. Please expect my reply by early next week.

    Best Regards,
    Arush

  • 0 in reply to Arush Gupta
    TI__Mastermind 23795 points

    Hi Christoph,

    I discussed this with my colleague. So basically, due to higher path inductance, there can be some ringing. (Can you share some zoomed in waveform of Vin, Vout, Iin).

    To solve this issue, please add some more decoupling cap and input cap and output cap. This should fix the issue. Please share some waveforms and schematic in case this doesn't solve the issue.

    Click resolved if this answers your query or reply here for follow up queries. 

    Best Regards,
    Arush