so I figured out where the buzzing is coming from in my circuit, and I think I'm starting to see the problem with it.
The DC/DC step down converter I'm using: http://www.ti.com/lit/ds/symlink/tps54531.pdf
So what this is doing is charging up a super capacitor fairly quickly at 5.6V on the output, and since my feedback is after the current-limiting resistors, I realized now that when the capacitors are fully discharged, I'm essentially shorting the post-resistor node.
So the converter is trying to upkeep a 5.6V after the current-limiting resistors (which at that point is basically ground) which makes it run at full throttle. Not good!
My question is, would moving the feedback before the current-limiting resistors help? What I'm kindof unsure about is since the capacitors are essentially a short to ground at no-charge, would the capacitors initially see no voltage on the input, since it is all dropping across the current-limiting resistors?
Or, would this be compensated by residual charge and the capacitors still charging with some small current and raising the voltage?
Thanks :) If there is some other solution please let me know!!