18 mOhm ESR and what it buys the power rail
The TPME228M002R0018: The 18 mOhm equivalent series resistance (ESR) is the key parameter for this 2200 µF tantalum capacitor — it sets the ripple current rating and the self-heating under load. In a 2.5 V rail, that low ESR means the capacitor can absorb higher AC ripple without exceeding the internal temperature rise limit, which is critical for output filtering in a point-of-load regulator.
Military temperature range for harsh-environment decoupling
In an avionics power supply that sees cold soak and engine-bay ambient, the capacitor stays within its derating envelope without a voltage or ripple-current penalty at the extremes.