I have a slight Catch-22 with my circuit portion shown below.
The ADM6320 is, among other things, an undervoltage detector with factory threshold of 2.93 V (thus Reset output pin toggles when VCC < 2.93V).
I wanted to alter the threshold to be 3.45 V, so I inserted a resistive divider of ratio 0.85 as seen below.
Only one problem: The values of the divider resistors are of a similar order of magnitude to the pullup resistor on the Reset output pin of the IC. I'm concerned that there will be problematic interplay at certain values of VCC. (For reference, I have also included the Internal block diagram of the ADM6320, see further below.)
Of course I could choose resistor values that are significantly different, but I am concerned about unnecessary current draw.
What values would you optimally set for the divider on VCC input pin, and for the pullup on the Reset output pin? I am having a bit of trouble imagining what behavior might result at various values of VCC, and how to ensure all cases are considered.
Internal block diagram of ADM6320: