NOTE: This is not my final configuration, if you have a look at the last section you will see that lowering the ferrite bead impedance drastically helps with step responseĪnd here are some configurations that did not did not make the cut. Here is the initial pi-filter configuration I have chosen, a 10μF electrolytic capacitor, a 33Ω ferrite bead, and a 10μF ceramic capacitor NOTE: This plot is a bit deceptive as it looks like the circuit is able to respond well to transients, HOWEVER if you also look at the frequency response (see next section) you will see that we can do better To help with comparison, below is what the step response looks like without any filter present
For the step response I am using a current load configured with a pulse function, with the step/pulse looking something like this:
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