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TPS22953: DC electrical specification for PG pin

Gavin Jones67193
Prodigy 210 points
Part Number: TPS22953


Dear Community,

The data sheet for the TPS22953 appears to be missing some DC electrical specifications for the PG pin.

1) When the PG pin is driving low and sinking 400uA, (VIN and VBIAS between 2.5 and 5.5V) what is the maximum output voltage on the PG pin?

2) When the PG pin is high impedance and the pin voltage is externally pulled up to VOUT (VOUT, VBIAS and VIN between 3.4V and 5.5V), what is the maximum leakage current into the PG pin?

Thanks for your help.

Best regards,

Gavin.

  • 0
    TI__Genius 15780 points

    Hi Gavin,

    Let me help to answer your questions below:

    1) If you take a look at the scope shots in the Typical Switching Characteristics section of the datasheet, you will find that the PG signal gets very close to 0V. Do you have a specific voltage that you are hoping to stay below? This is not a specific parameter we measured since it would be dependent on the pull-up voltage and resistor value.

    2) At VIN = VBIAS = 5.7V, we tested 30 units across the full temperature range to see what the leakage current into the PG pin was. The maximum current we recorded was 26.3nA.

    Let me know if you have any additional questions.

    Thanks,

    Alek Kaknevicus

  • 0 in reply to Aleksandras_Kaknevicius
    Prodigy 210 points
    Hi Alek,

    Thanks for the reply.

    1) I am using PG to drive an input with Vil max = 0.4V. I therefore require the PG voltage to be comfortably below 0.4V when sinking 400uA. Is this going to be the case?

    2) The leakage will not be a problem for me, thanks for clarifying.

    Best regards,
    Gavin.
  • 0 in reply to Gavin Jones67193
    TI__Genius 15780 points

    Hi Gavin,

    Doing some additional investigation, it looks like we did do some measurements on the PG pin to measure VOL. We tested 30 units across temperature and voltage while sinking 1mA into the PG pin. What we found was that within the temperature range for the device the voltage never exceeded 20mV. This should be plenty of margin for 0.4V :).

    Thanks,

    Alek Kaknevicius

  • 0 in reply to Aleksandras_Kaknevicius
    Prodigy 210 points

    Hi Alek,

    That's good. Thanks very much for the quick response.

    Best regards,

    Gavin.