A 100 µF cap with sub-100 mOhm ESR can handle 1–2 A ripple in a buck converter output stage without exceeding the 125°C ceiling.
Package and temperature grade — board-fit checklist
Surface-mount 2917 (7343 Metric) case, size code D, with dimensions 7.30 mm x 4.30 mm and seated height 3.10 mm max. No derating needed at 125°C as long as the ripple current stays within the datasheet limits.
