22 µF, 20 V, 300 mOhm — the ESR drives the ripple budget
TPSD226M020R0300 is a 22 µF ±20% molded tantalum capacitor rated at 20 V, with a 300 mOhm ESR that sets the ripple-current ceiling in a bulk decoupling or output-filter role. The 300 mOhm ESR is the number to budget for self-heating — at 1 A ripple the internal temperature rise is roughly 0.3 W × thermal resistance, so keep the RMS current below the datasheet limit at the ambient temperature.
2917 case, 7.30 mm × 4.30 mm footprint
The 2917 (7343 Metric) case measures 7.30 mm long by 4.30 mm wide, seated height 3.10 mm max — this is the standard D-size tantalum footprint that matches existing pad patterns across the TPS family. Surface-mount assembly on a standard FR-4 board; the molded package is compatible with reflow soldering profiles typical for tantalum caps.