I'm designing a step-down buck converter and I'm a little bit worried about ripple current which flows through the output capacitors.
In my research on the internet I found that ripple current is given by Vrms_output/ESR. If Ι have 3.5A maximum output current and I want transient responce this mean, 0A to 3.5A = 3.5A ripple current. But this value (transient step), Ι think isn't my normal ripple current.
In my calculation corresponding to equation above if I want a ripple 10mV and select ceramic capacitor which gives me low ESR (< 5mΩ), this is equiavalent to 2A ripple current and I think that isn't normal!
If that is true, can a ceramic capacitor handle this magnitude of current?
Is this amount of current (ripple current, Irms) identical with Inductor ripple current of regulator?