ESR and ripple current reality
The TPSE227M006R0100: The 100 mOhm ESR at 100 kHz is the figure that governs ripple voltage at the output — for a 1 A ripple current, expect 100 mV of ripple across the capacitor. The 220 µF capacitance at ±20% tolerance means the minimum capacitance is 176 µF at end-of-life, which still provides adequate bulk charge for most decoupling applications on a 6.3 V rail.
