I'm thinking about using a 64A4 in a new design and have been evaluating 3.3V linear regulators since I'd prefer to run off a single 5V supply for the rest of the system. All the ones I've found have claimed sensitivity to ESR on the output cap, but even using allegedly compliant caps doesn't seem to eliminate unacceptable spikes (up to 4.1V) when switching 200 mA (the max. the part is supposed to consume).
Has anyone else dealt with this issue? What solution did you come up with? Thanks.