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LMZ34202: PWRGD electrical characteristics

Part Number: LMZ34202

Looking to use the PWRGD pin to turn on a LED.  Was planning to have PWRGD_PU pulled to VOUT, LED w/series resistor from VOUT to PWRGD.  I cannnot find the current limits for PWRGD.  I want to make sure it can act this way.

  • Hi Mark,

    The sinking capability on PWRGD pin is roughly 1mA. Unfortunately this is not enough current to allow you to implement your design. Alternatively, I'd recommend adding an external FET that can since 5mA+  this way you aren't limited to the 1mA pull down restriction of the internal switch. In this circuit, the LED will turn on if PWRGD is HIGH and Vout is within regulation.

    Regards,

    Jimmy