General • Re: RP2350 "Minimal Board" schematic input power capacitors

Even the connections inside the capacitor itself are significant, so physically smaller capacitors are better - 0402 size are typically used; if you use a capacitor of the same nominal capacitance but in a bigger case size (like 0805) then it will perform worse.

I agree that different capacitors have different ESRs, but remember that the capacitance and track inductance form a resonant circuit and the ESR of the capacitor helps dampen this. Hence on very high speed applications one sometimes has to use a large and small capacitor (value and size) in parallel, although this is probably not required for a RP2xxxx device.

But the only way to be certain is to use an extremely high frequency scope on each pin.

Statistics: Posted by MikeDB — Thu Jun 12, 2025 11:07 pm

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