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TPS2561A-Q1 Input/Output capacitor

Kuramochi Tadahiko
Guru 28715 points
Other Parts Discussed in Thread: TPS2561A-Q1, TPS2561-Q1, TPS2556

Hi,

I would like to know how to design the input/output capacitor of TPS2561A-Q1.

Though there is no mention about the input/output capacitance on the datasheet of TPS2561A-Q1.

There is mention about it on the datasheet p12 of TPS2561-Q1, should I refer this datasheet?

Regards,

Kuramochi

  • 0
    TI__Mastermind 42795 points

    The guidelines provided on page 10 of the TPS2556 datasheet will also apply to the TPS2561A-Q1 and are repeated here for your convenience.

    INPUT AND OUTPUT CAPACITANCE

    Input and output capacitance improves the performance of the device; the actual capacitance should be optimized for the particular application. For all applications, a 0.1μF or greater ceramic bypass capacitor between IN and GND is recommended as close to the device as possible for local noise decoupling. 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 transient conditions. This is especially important during bench testing when long, inductive cables are used to connect the evaluation board to the bench power supply. Output capacitance is not required, but placing a high-value electrolytic capacitor on the output pin is recommended when large transient currents are expected on the output.