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TPS7B86-Q1: Internal pull-up resistor of PG

Dice-K
Mastermind 6500 points
Part Number: TPS7B86-Q1

Hi support team,
I have a question about SBVS362B, revision B of the TPS7B86-Q1 datasheet.

The PG pin is an open drain and has been modified to remove the internal pull-up resistor.

However, there are some descriptions that there is an internal pull-up resistor.

In fact, please let me know if the PG has an internal pull-up resistor or not.

Regards,
Dice-K

  • TI__Mastermind 41085 points

    Hi Dice-K,

    This device is available with an internal pull-down resistor for PG and with an open drain output for PG. I see that the datasheet isn't very clear about that. I'll make a note to update the datasheet to be more clear about it.

    I think in the nomenclature a "D" before the first "Q" signifies either the internal pull-down or the open drain output, and a "B" signifies the other. I'm going to look further into this to give you a more firm answer. 

    Thanks,

    Nick

  • in reply to Nick Butts
    Mastermind 6500 points

    Hi Nick,
    Thank you for your reply.

    Does it mean that the part number distinguishes between open drain and internal pull-up?
    I'm expecting a more firm answer.

    Best regards,
    Dice-K

  • in reply to Dice-K
    TI__Mastermind 41085 points

    Hi Dice-K,

    I misspoke. This family of devices (TPS7B83/84/85/86/87/88-Q1) is available with and without PG, and with an open-drain PG and with an internal resistor for PG, but TPS7B86-Q1 is only available with an open-drain output. The TPS7B86-Q1 datasheet correctly specifies the PG topology in the pinout section, but sections 7 and 8 need to be updated to reflect that. Thank you for pointing this out and sorry for the confusion. 

    Regards,

    Nick

  • in reply to Nick Butts
    Mastermind 6500 points

    Hi Nick,
    Thank you for your answer.

    I have understood as follows.

    ・PG is not internally pulled up.
    ・PG is an open drain output.
    ・In revision C, the RPG in section 6.5 Electrical Characteristics will be removed.
    ・In revision C, Section 7.3.2 and Section 8.1.8 will be corrected.

    Best regards,
    Dice-K

  • in reply to Dice-K
    TI__Mastermind 41085 points

    Hi Dice-K,

    You are correct on all points, except that the datasheet revision that implements these changes may not be revision C because there is already a planned revision.

    Regards,

    Nick