Reading the datasheet for an AZ1117E adjustable LDO voltage regulator capable of supplying 1A, I noticed the following recommendation, which I don't understand:
"Close to the OUTPUT pin, it is not recommended to use a capacitor smaller than 0.68μF in parallel with output capacitor. When the output capacitor parallels 0.1μF capacitor, the 0.1μF capacitor must be away from the OUTPUT pin, the distance is no less than 5mm."
What is the reasoning behind that recommendation? Are they concerned about inrush current through a small ceramic capacitor with very low ESR or something like that? I can see why larger 1μF+ capacitors are needed on the input/output, but I don't get why smaller ones should be kept far away from the part.
I'm not sure if the current draw is actually relevant to this question or I'm simply unobservant, but I haven't noticed similar recommendations in other voltage regulators' datasheets.