2.2 µF at 50 V — the decoupling sweet spot
The TPSD225K050R1200: This is a molded tantalum capacitor in the TPS series, delivering 2.2 µF ±10% with a 50 V rated voltage. The 1.2 Ohm ESR at 100 kHz sets the ripple current ceiling — for a 12 V rail with 100 mV p-p ripple, the capacitor dissipates roughly 8 mW, well within the D case thermal budget.
D case 2917 — footprint and temperature range
Housed in the D case (7.30 mm x 4.30 mm, 3.10 mm seated height), the 2917 footprint is a standard tantalum size.
