The TPS2583x-Q1 device requires high frequency input decoupling capacitor(s) and a bulk input capacitor, depending on the application. A high-quality ceramic capacitor type X5R or X7R with sufficient voltage ratings are recommended. To compensate the derating of ceramic capacitors, a voltage rating of twice the maximum input voltage is recommended. The bulk capacitance selection depends upon a number of factors: long leads from the automotive battery to the IN pin of TPS2583x-Q1, cold or warm engine crank requirements, etc. The bulk capacitor is used to dampen voltage spike due to the lead inductance of the cable or the trace. For this design, one 10 μF, 50 V, X7R ceramic capacitors are used. A 0.1 μF for high-frequency filtering and place it as close as possible to the device pins. Consider adding additional bulk capacitance for operation through low V_IN warm-crank profiles is required by the vehicle OEM.