TPS22954: Unused Power Good pin

Guru 11125 points

Part Number: TPS22954

Datasheet page-24 is described that unused PG pin is tie to GND.

About unused PG, I think that left open is no problem, is it correct? 

Best regards,

Satoshi

3 Replies

  • Hi Satoshi,

    You are correct, a floating (open) PG pin will not cause any problems. 

    Thanks,

    Alek Kaknevicius

  • Guru 11125 points

    In reply to Aleksandras_Kaknevicius:

    Alek-san

    Thank you for quick reply,

    Sorry for question bit by bit,
    If unused PG pin, is tie to GND really no problem?
    I think that tie to GND will increase current similar to pullup.

    Best regards,
    Satoshi
  • In reply to Satoshi:

    Hi Satoshi,

    Tying the PG pin to ground does not cause additional leakage through the device since the PG pin is not internally pulled up. When the output is high, the PG pin is left floating, and when the output is low, the PG pin is pulled low. In either case, connecting the PG pin to ground does not pull additional current through the device since the PG pin is never internally pulled up.

    Thanks,

    Alek Kaknevicius