• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 3 answers
  • Subscribers 63 subscribers
  • Views 1408 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.

TPS7A69-Q1: Maximum rating current of PG pin

Kuramochi Tadahiko
Guru 28715 points
Part Number: TPS7A69-Q1

Hi,

I received the following question from my customer.

How much is the maximum rating current of PG pin and recommended pull-up resistor value?

Best Regards,

Kuramochi

  • 0
    TI__Guru 50190 points

    HI Kuramochi-san,

    It looks like the datasheet is assuming a minimum of a 10K pull-up resistor assuming a 5V Pull-up:

    So if you customer uses a larger resistor, it would be able to pull-down to a lower voltage. There only maximum value would be a function of the leakage current  ILKG into the pin. To determine this, we would need to know both the pull-up voltage and the customers desired VOL threshold. So it really depends on what your customer is comfortable with.


    Regards,

  • 0 in reply to JCHK
    Guru 28715 points
    John Cummings-san,

    Thank you for your reply.

    My customer would like to set the pull-up resistor as much as lower.
    Could you tell me the lowest resistance of pull up?
    (Probably, they must prevent adding any noises by application specification.)

    Best Regards,
    Kuramochi
  • 0 in reply to Kuramochi Tadahiko
    TI__Guru 50190 points

    HI Kuramochi-san,

    What voltage are they pulling the PG pin up to?

    If it is 5V, then the minimum allowable resistor for a 0.4V VOL would be be a 10KOhm Resistor.

    Does this answer your question?

    Regards,

  • 0 in reply to JCHK
    Guru 28715 points
    Hi John-san,

    Yes, the pull-up voltage is 5V.

    >If it is 5V, then the minimum allowable resistor for a 0.4V VOL would be be a 10KOhm Resistor.

    This means that Iol=0.5mA
    However, I think the PG pin can pull current more.
    How much ampere can the PG pin pull current?

    Best Regards,
    Kuramochi
  • 0 in reply to Kuramochi Tadahiko
    TI__Guru 50190 points
    Hi Kuramochi-san,

    Based on the information I can find, the 10K should be the minimum resistor value. Why does your customer want to use a smaller value?

    Regards,