Molded tantalum — what the 7 Ω ESR means for your rail
The TAJA225M010ANJ: This is a molded tantalum capacitor from the TAJ series, 2.2 µF at 10 V with ±20% tolerance. For a 100 kHz switching regulator output, that ESR contributes roughly 14 mV ripple per 2 mA ripple current — enough to matter on a 1.8 V core rail.
The lifetime derates with applied voltage and ambient — at 85°C and 50% rated voltage, expect significantly longer useful life.
1206 footprint — board fit and placement
Standard 1206 (3216 metric) case, size code A. The 3.20 mm x 1.60 mm footprint with 1.80 mm seated height fits most pick-and-place lines without nozzle change. Reflow profile follows standard tantalum recommendations — no special bake required for unopened moisture-barrier bags within the shelf life.