Capacitance and voltage — the BOM-fit decision
The TPSX476K016R0180: The ±10% tolerance covers the full temperature range; at 125°C the capacitance shift stays within this band, which matters for timing circuits or filter poles that need a known corner frequency across the operating envelope.
ESR and ripple — what 180 mOhm means on the bench
180 mOhm equivalent series resistance at 100 kHz is the figure that governs ripple current heating and output voltage ripple in a switching regulator. For a buck converter switching at 500 kHz, this ESR contributes roughly 30 mV of ripple per amp of ripple current — a clean enough output for most logic rails without an additional post-filter. The molded construction keeps the ESR stable across the -55°C to 125°C range; unlike some lower-cost conformally coated tantalums, the molded case does not crack under thermal cycling, so the ESR does not drift upward after temperature shock.
Package and board layout — 2917 footprint
The low 1.5 mm height clears most heatsinks and mezzanine card gaps. Surface-mount reflow profile follows standard J-STD-020 for a 1.5 mm-thick component; no special bake required if the reel is less than 72 hours out of the moisture barrier bag at <30°C/60% RH.
Lifecycle and sourcing — active production
No known pin-compatible replacement within the TPS family — the X case size and 180 mOhm ESR combination is the specific variant for this capacitance/voltage point.