220 µF bulk cap with a 50 mOhm ESR floor
The TPSE227K016R0050V: The 50 mOhm ESR at 100 kHz is the spec that governs ripple handling in a switching regulator output — lower ESR means less self-heating and better filtering of the switching ripple.
2917 footprint, size code E, surface-mount
The surface-mount package fits the common tantalum capacitor footprint used across power supply designs.
