When looking into the datasheet of an voltage regulator, they often recommend adding a capacitor from the ADJ pin to ground, to improve ripple rejection.
It can also often lead to an significant increase in PSRR when doing so, according to their performance graphs:
But why? It seems kinda unintuitive to me. Adding a huge capacitor at the feedback pin makes me think that the changes in the output voltage will take longer time for the regulator to measure(i.e slower control loop), because the capacitor has to be charged/discharged first. But this doesn't seem to be the case.
What am i missing?