I noticed in the design in section 8.2.1 of the datasheet (24V input, 5V output), output capacitors with a 25V rating were used. Is this just being extremely conservative, or is this strictly necessary? After the inductor, I imagine the voltage will actually never get nearly this high. I can fit my design into a much smaller footprint if I use 12V rated (or even smaller) output capacitors on the 5V line..