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TPS3808G18 - Maximum Sinking Current

Hello , 

We are using TPS3808G18 in our current design , we have connected the open drain RESET output  to 3 external device.

we would like to know what is the maximum sinking current capacity of the RESET pin. 

can this sink current vary from push-pull to open-drain output ?

Thanks 

Antony 

  • HI Antony,

    The datasheet should specify the expected range for the pull-down current on the RESET pin. What it does give is a recommended maximum pull-up of 6.5V and a minimum recommendation of 10K. With this you would have a 0.65mA sink current which is well below the absolute maximum sink current rating of 5mA.

    Since you are pulling up to 3.3V, you would have margin even with a 1K pull-up (however, I would recommend higher than 10K unless you have a specific need for a very aggressive pull-up).

    Regards,
  • Got it !! Thanks for the explanation .



    Regards
    Antony