In a new design I would like to use the MAX682. In the datasheet I found this typical operating circuit:
I would like to use it exactly like that except that I'm going to pull /SKIP to GND.
In table 2, I find the recommended values for the capacitors: CIN should be 2.2uF, CX should be 1uF and COUT should be 47uF (tantalum) or 10uF (ceramic).
First of all, why does the needed capacity depend on the type of capacitor? And secondly: from the circuit it looks like I can't use electrolytic capacitors for CIN and CX. Is that correct? Why is it so, because it seems clear that the polarity won't change. I would prefer to use electrolytic capacitors because I have them in stock.
I actually did a quick test myself and used electrolytic capacitors everywhere. In total, the circuit drew about 110mA, while the 5V circuit drew only 2mA. And besides that, the output has about 0.4V AC noise. However, it's not entirely sure that this is just because of the capacitors, because I for example didn't use a very short trace between GND and PGND (pin 1 is top left):
So it really isn't possible. The question remains why.