What the 250 mOhm ESR means for your rail
The TPSW336M016R0250: The 250 mOhm equivalent series resistance sets the ripple current ceiling — at 100 kHz, a 33 µF cap with this ESR handles roughly 1.1 A RMS before self-heating shifts the dissipation factor. For a buck converter output filtering 2 A peak-to-peak ripple, that single cap stays within its thermal budget without needing a parallel bank. The molded TPS series construction keeps the ESR stable across the -55°C to +125°C range; the tantalum anode doesn't exhibit the capacitance roll-off ceramic caps show under DC bias, so the 33 µF value holds at the full 16 V rated voltage.