100 µF, 16 V, 100 mOhm — the ESR drives the ripple rating
The TPSY107M016R0100: That ESR figure is the one that governs how much ripple current the part can handle in a DC-DC output filter — at 100 kHz, the ripple current rating is roughly the square root of (power dissipation / ESR), so a lower ESR directly buys more ripple headroom for the same case size. The 2917 (7343 metric) package with a 2.0 mm seated height is the standard footprint for this capacitance range — it lands on the same pads as any other 2917 tantalum, so a board designed for a competitor's 100 µF/16 V part accepts this one without a layout change.
Temperature range and derating margin
The ±20% tolerance is standard for tantalum electrolytics — the capacitance change with temperature and DC bias is small compared to ceramic MLCCs, so a 100 µF nominal stays above 80 µF across the operating range, which is what the downstream regulator's loop compensation expects.