SLVUCV6 May 2024 TPSM81033
A 150µF tantalum capacitor C2, is added as the input capacitor in the EVM, The ESR of the tantalum capacitor is 0.1Ω, to damp the ringing of the input voltage when the EVM is powered by a power supply with a long cable. The capacitor is not required for proper operation and can be removed in a real application.
If the input current is as large as 5A or even larger, then TI recommends to remove the 2.2µF capacitors at AVIN pin (C1).