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  • Resolved

TPS543C20: EN internal pullup

Part Number: TPS543C20

Hi,

Could you tell me about the value of internal pull-up resistor of EN pin?

Also, what is the circuit configuration like?

Best Regards,

Yuto Sakai

  • We will need to check this with responsible engineer and will get back to you after Holidays.

    TI Wide Vin Buck Converter & Controller Applications Engineer

  • In reply to YangZhang:

    I'll look into this after the holidays.  It is probably not a pull up resistor. To better assist you can you tell me why you need to know?  What is your concern?

    Best  Regards,

    John Tucker

    BSR-CCP LV/MV DC/DC Applications

  • In reply to JohnTucker:

    EN pin has internal pull up 2Meg to BP voltage.  There is additional circuitry concerned with the external VIN UVLO threshold and hysteresis also connected to EN internally.  If you need those details we will need to consult an IC designer, but the datasheet should provide enough information for you to design with.  Do you have a specific concern?  That may be easier to answer than finding internal design details.

    Best  Regards,

    John Tucker

    BSR-CCP LV/MV DC/DC Applications

  • In reply to JohnTucker:

    Hi John-san,

    Thank you for your reply.
    Please let me ask you a question.
    What is the minimum value of the internal resistance?

    Best Regards,
    Yuto Sakai
  • In reply to Yuto Sakai:

    Sakai-san,

    I got the information from IC designer. The range is 1.219Mohm to 3.638MOhm over the temperature(-40C to 125C).

    Best  Regards,

    John Tucker

    BSR-CCP LV/MV DC/DC Applications

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