220 µF, 16 V, 100 mOhm ESR — the bulk decoupling decision
The TPSV227M016R0100: The 100 mOhm ESR is the key figure for ripple handling in a DC-DC converter output — at 500 kHz, the impedance is dominated by this resistance, not the capacitive reactance, so the ripple voltage across the cap is I_ripple × 0.1 Ω. The V case code is the manufacturer's size designation for this footprint.
Temperature range and operating environment
The molded construction provides mechanical protection against board flex during reflow and field vibration.
The ±20% tolerance is standard for tantalum electrolytics — derate the voltage by 20% for reliable operation below 85°C, and by 50% above 85°C, per industry practice.