Dear sir or madam,
I have a question regarding the LTC3425. I want to implement an LC-filter at the low voltage input. In simulation in SPICE, the circuit starts to oscillate or has an excessive ringing. I tried some techniques from this very useful article(http://www.analog.com/en/technical-articles/designing-second-stage-output-filters-for-switching-power-supplies.html), but that didn't solve the problem. Is it possible to add something at the error amp compensation to solve this problem?