The TPME687K004R0023: 680 µF at 4 V rated — this is a bulk storage cap for a 3.3 V or 1.8 V rail where the 23 mOhm ESR keeps ripple voltage under control. The 23 mOhm ESR limits self-heating at high ripple currents; in a switching regulator output stage, that ESR directly sets the output ripple amplitude and the capacitor's own temperature rise. The molded 2917 case handles the mechanical stress of reflow assembly without cracking — a known failure mode in unencapsulated tantalum chips.
The capacitance tolerance is ±10%, tighter than the ±20% many tantalum lines carry, which helps maintain the filter corner frequency across temperature.
Sourced through independent distribution; availability confirmed at RFQ against your target quantity and date-code preference.