Good solution for TPS54202 input filter design?
Choose a ceramic capacitor with an X7R temperature coefficient and a voltage rating of at least 25 volts, and an inductor with at least a 1 amp rating at 125 Celsius.  The schematic is 







simulate this circuit &ndash; Schematic created using CircuitLab

Keep the traces as short and wide as possible, and run the ground trace from C7-ground directly to the ground of input capacitors C5 and C2 (also short as possible).  Run the Trace from L2 directly to the high side of input capacitors C5 and C2.

Good Luck!