Electronic – decoupling capacitor’s inrush current effect on usb filtering

decoupling-capacitorfilterusb

I am confused about 2 different articles about decoupling capacitors and usb filtering.

First one: https://www.autodesk.com/products/eagle/blog/what-are-decoupling-capacitors/

this says i should use 2 different decoupling capacitors for each ic. One for high frequency(0.1 uf) and one for low frequency(10uF) noise. This makes great sense.

The second one is about usb voltage filtering. http://andybrown.me.uk/2015/07/24/usb-filtering/

This article says "It’s a little known fact that the USB 2.0 standard mandates a maximum of 10µF in parallel with VUSB to limit the inrush current"

So the problem is, i have 3 ics. with each has 10 uF in parallel i get way more impedance between 5V and gnd since they're all parallel between 5v-gnd.

Is using only 1 piece of 10uF at the end of filter instead of placing 3 pieces 10uF for each ic enough?

Edit:
One ic is pca9555 nxp.com/docs/en/data-sheet/PCA9555.pdf? (could not seea cap value on this) other is mcp2221A ww1.microchip.com/downloads/en/DeviceDoc/20005565B.pdf

Best Answer

Can you reference(or link) the component datasheets to see what the manufacturer recommends for decoupling capacitors? It is likely that the components dont really need their own 10uF cap. Often times just a 0.1uF or a 0.1uf + 1-4.7uF will be recommended.

I would expect that an individual 0.1uF plus a shared 4.7 or 10uF would work just fine.