SLVS850A June 2008 – September 2023 TPS2551-Q1
PRODUCTION DATA
Input and output capacitance improve the performance of the device; optimize the actual capacitance for the particular application. For all applications, a 0.01 μF to 0.1 μF ceramic bypass capacitor between IN and GND is recommended as close to the device as possible for local noise de-coupling. This precaution reduces ringing on the input due to power-supply transients. Additional input capacitance may be needed on the input to reduce voltage overshoot from exceeding the absolute maximum voltage of the device during heavy transients. This additional input capacitance is especially important during bench testing when long, inductive cables are used to connect the evaluation board to the bench power-supply.
Placing a high-value electrolytic capacitor on the output pin is recommended when the large transient currents are expected on the output. Additionally, bypassing the output with a 0.01 μF to 0.1 μF ceramic capacitor improves the immunity of the device to short-circuit transients.