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TPS1H200A-Q1: pulling up FAULT and DELAY without IN and DIAG_EN

Ryoma Ohashi
Expert 5085 points
Part Number: TPS1H200A-Q1

Tool/software:

Hi team,

Is it OK to pull up FAULT and DELAY pin when no power supply/input on IN and DIAG_EN? Any concern on the reverse current flowing through protection diode?

Regards
Ohashi

  • +1
    TI__Expert 7871 points

    Hi Ohashi,

    There should not be a concern here as long as the voltage on fault/delay is not exceeding the recommended/absolute ratings in the datasheet. 

    So, FAULT/DELAY = high and IN/DIAG_EN = low. Is VS high or low? Which protection diode are you referring to? 

    Reverse current is a concern when there is a higher voltage potential on the output than on VS or during a reverse polarity condition. 

    Best Regards,

    Rishika Patel