My heroic efforts for X7R bypassing/decoupling.

[IVX]

I've measured several types of elcaps at the current= 1A (~30nS falling edge)square wave for ESR&ESL evaluation. My choice was Hitachi HU3 22x30 1000u/100V=45mOhm 8nHn, maybe 8nHn aren't exact value, but others gave around 12-15 nHn. Simulation with additional 10uF (ideal) show almost null ringing, so I have concentrated all my patience and taken 200 pieces KX7RCERCAP 0.22/50V 0805.

 

[subwo1]

Hello Ivan, so it seems more economical to parallel some cheaper capacitors than to use a single high end one. The performance can be similar. Best Regards.

 

[IVX]

Yeah, if the time isn't money yet However 200 pcs 0805 not so easy way at least.. Next time i'll just cut the pins of the hole through X7R 4.7uF caps etc.