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TPS40057: SW transient negative spec

Given Ding
Genius 10495 points
Part Number: TPS40057


Hi Team, 

in datasheet, there is negative spec as below. customer want to know how we get below transient spec, that is , what test do we do to provide such spec? Thanks. 

BRs

Given 

  • 0
    TI__Guru* 75952 points

    Hi Given,

    My understanding is that a negative transient is coupled into SW at the applicable amplitude for a given test duration. Following that, the behavior and functionality of the IC is confirmed.

    Regards,

    Tim

  • 0 in reply to Timothy Hegarty
    TI__Genius 10495 points

    Hi Tim, 

    Thanks for your reply. 

    So you mean during the test on EVM, there is such spike and the behavior/function of IC is good, then we provide the spec, right? 

    But how can we guarantee the spec is reliable?  Customer want to know if we do some related qualification or evaluation to verify the spec.

    To my understanding,  For DC value, we can test leakage current/ UIS to verify the spec, but not sure for the transient spec.  Thanks. 

    BRs

    Given 

  • +1 in reply to Given Ding
    TI__Guru* 75952 points

    Hi Given,

    I'm not exactly sure for this controller specifically, but generally we test at hot/cold extremes over a long duration (e.g. 24 hours) Once the test is complete, we verify the part in ATE to verify all the parametrics.

    Regards,

    Tim