150 mOhm ESR and the 6.3 V rail
The TPSC157K006R0150: The 150 mOhm ESR is the key derating parameter for this 150 µF, 6.3 V molded tantalum. In a 6.3 V rail, the ripple current capability is set by I_ripple = sqrt(P_max / ESR). At 150 mOhm, the capacitor can handle roughly 1.0 A ripple at 85°C before self-heating drives the core temperature above the 125°C ceiling.
