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PGA305: PGA305 AVDD

Lori Ferger52
Intellectual 495 points
Part Number: PGA305

We need to temporarily power a circuit on a pcb which uses the PGA305. The circuit will draw about 10 milliamps temporarily (seconds) as a functional circuit check.

Is it acceptable to use the regulator voltage, AVDD, pin 9 of the PGA305,  to power an external circuit for a brief period of time?  If so, what is the maximum current allowable?  

 

  • 0
    TI__Mastermind 31655 points

    Hello Lori,

    The maximum external load on the AVDD regulator is 4mA. Going above that for any length of time could cause the AVDD voltage to drop. Going up to 10mA could cause the AVDD voltage to drop below the POR threshold of 2.7V and the device will be shut down until the AVDD voltage goes above the threshold again.

    Additionally, any additional loading on the AVDD regulator will generate more heat which could impact performance.


    Regards,