Other Parts Discussed in Thread: LMZ14203H, , LMZ14201
We use the LMZ1420xH series for many applications.
As already asked in the original thread, we experience EMI problems at 60-70MHz and 200MHz.
We tested different output capacitors combinations as recommended, nothing helps.
Initially we had a lot of problems also with conducted emissions, therefore the input stage is well filtered.
Just to mention that the LC filter recommended in the datasheet if far from responding as described.
Only with the addition of a large choke and ferrite beads we managed to keep it within the limits.
For this reason I tend to believe the emitted EMI is from the output stage.
But it seems that any attempt to add a filter only makes things worse.
Reading other threads I see that other users got the same results, e.g.
I will be glad to know if there is a solution, we use this series in very large quantities but the EMC compliance is a game stopper