loop filter parameters
Hi eejli,
Few observations;
1> The first cap seems too huge. Having a 72uF cap in parallel with 39pF will have no effect, meaning the 39pF cap becomes useless so also the 80 pF.
2> As a thumb rule, the cap C2 ( the 39pF) should be nearly 1/10 of the C1 ( the 72uF). As I understand this cap is put to add additional pole to improve the PM, So it would be better put at the end, after the 2 stage filter.
As saro_k_82 suggested, just check the loop parameters.
Regards,
RDV