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TPS82150: safe to connect PG to a 5V rail that is powered when the TPS82150 is not?

Britton Kerin
Intellectual 310 points
Part Number: TPS82150
I think this is ok because datasheet says up to 7V absolute max. without any parametric dependence on VIN, and section 7.4.4 of the datasheet says that PG goes high impedance withe VIN
  • 0
    Intellectual 310 points
    My original post got truncated somehow, here is the intended content: I think this is ok because datasheet says up to 7V absolute max. without any parametric dependence on VIN, and section 7.4.4 of the datasheet says that PG goes high impedance withe VIN
  • 0 in reply to Britton Kerin
    Intellectual 310 points
    Ok third try. Btw these forums are worse than most for mangling formatting and other weird stuff. I think this is ok because datasheet says up to 7V absolute max. without any parametric dependence on VIN, and section 7.4.4 of the datasheet says that PG goes high impedance withe VIN less than 0.7V (power supply removal). However I'm paranoid about driving any chip with it's power supply removed and all the examples show PG pulled up to the TPS82150 output itself. So iss it safe to pull up PG to an external 5V rail that is on when the chip is not?
  • 0 in reply to Britton Kerin
    TI__Genius 17905 points

    Hi Britton,

    Yes, it is fine to pull up PG to an external 5V that is on even when the chip is not powered on.

    Kris