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TPS62003: PG Pin Maximum Current Sink

Gerald
Genius 9570 points

Part Number: TPS62003

Hi Experts,

In our customer current application, they didn't take into sufficient account the limited current-sinking capability of the PG pin. A typical sinking capability of 10uA is declared, but there is no indication of a maximum absolute value. The customer said that they are currently drawing much more

And furthermore, the customer wants to understand how "strong" can be this pin if he sinks a high current for 1-2 hundred milliseconds.
Just that his current application should sink around 400uA for 10ms. (8.2k pullup toward a 3.3V)

I hope you can help us. Thank you.

Best regards,

Gerald

  • 0
    TI__Mastermind 21660 points

    Hello Gerald,

    Thank you for reaching out.

    I need to check with design team and get back to you.

    Thank you,

    Regards,

    Moheddin.

  • +1 in reply to Moheddin Pasha Shaik
    TI__Mastermind 21660 points

    Hello Gerald,

    I would suggest to stick with the typical current sink value specified in the datasheet. Because 10uA typical current capability is specified, the PG is not designed to handle current in the mA range. Your limit 400uA seems to be too much. However If it would be possible for you to measure the PG impedance it could be possible to have an idea. Therefore it would be helpful to measure PG voltage drop versus Isink. The voltage drop should not exceed max. 0.2V.

    If the drop is permanent above 0.2V or 0.3 max. it is a reliability risk and/or the device can be damaged.

    Thank you,

    Regards,

    Moheddin.