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TPS7A96: PG connection to output

Sariel Hodisan
Prodigy 145 points
Part Number: TPS7A96

Tool/software:

Hello,

The datasheet specifies that the PG (Power Good) pin should be pulled up to the input voltage.
However, in my application, I need to pull it up to the output voltage instead.
My input voltage is 3.8 V, and the output is 3.3 V.
The load is static and constant.

Are there any potential issues with pulling the PG pin up to the output voltage instead of the input voltage, as recommended in the datasheet?

Thanks,
Sariel

  • 0
    TI__Genius 13740 points

    Hi Sariel,

    Yes, you may pull up PG to OUT instead of IN with the R_PG. What are you using the PG signal for? Is it a status indicator/ alarm or does it control another device downstream?  

    I believe PG is suggested to be pulled up to VIN for this device because of its low VOUT potential. If you pulled PG up to VOUT when say VOUT = 0.6V, the PG signal will likely not correspond to a logic-high since 0.6V is pretty low, and any downstream devices intended to be turned ON with PG will not be enabled because this voltage will likely be below their enable threshold. So pulling up to VIN does make more sense in this case but it is acceptable to pullup to VOUT instead if your application can tolerate it.

    Regards

    'Ishaan