Hi all,
I would need help answering following question for our customer regarding the output capacitor of the LM76003
They operate the LM76003 with Uin = 24V, Uout = 5V, Iout = 3.5A and an external synchronization clock with fixed 650kHz.
At the switching regulator output, they would - due to the high required output capacity and the poor availability of the MLCC cap.- use a polymer capacitor.
Unfortunately they had to find out that the polymer caps have a natural resonance frequency of less than 700 kHz, e.g. T520B107M006ATE018 from Kemet at approx. 430kHz (see diagram).,
What are the consequences of operating the capacitor above its resonance frequency (around 650kHz)?
Impedance and ripple current capacity do not speak against it at first. Are there any other problems you might get with it?
many thanks in advance.
Best regards,
Brian
