• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 198 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS25982: Inquiry about pull-up resistance value on the PG pin

JH Shin
Guru 10890 points
Part Number: TPS25982

Hello,

What is the recommended pull-up resistance value for the PG pin for 1.8V pull-up voltage? How to determine it?

Thank you.

JH

  • 0
    TI__Guru* 79071 points

    Hi JH,

    Please note :

    When there is no supply to the device, the PG pin is expected to stay low. However, there is no active pull-down in this condition to drive this pin all the way down to 0 V. If the PG pin is pulled up to an independent supply which is present even if the TPS25982 is unpowered, there can be a small voltage seen on this pin depending on the pin sink current, which in turn is a function of the pull-up supply voltage and resistor. Minimize the sink current to keep this pin voltage low enough not to be detected as a logic HIGH by associated external circuits in this condition.

    So select pull up resistance value high enough around 100k to few Mega ohms.

    Regards

    Kunal Goel