I'm looking for a capacitor to use as the output capacitor with the LDO regulator SP6205EM5-L-3-3. It says it requires a 2.2 µF capacitor, with an ESR less than 0.5 ohm.
I've found the TCJA106M010R0300 type of tantalum capactior would suffice.
However, these are quite expensive, almost half the cost of the regulator... I wondered if ceramics of type C3216Y5V1H225Z/0.85 (in the specification it says ceramics are allowed) would have the low ESR required (they say 'Low ESR', but it does not have a value specified).
What does low ESR mean at the frequencies involved with this regulator?