The low open-loop output impedance provided by the NMOS pass element in a voltage follower configuration allows operation without an output capacitor for many applications. As with any regulator, the addition of a capacitor (nominal value 1 μF) from the output pin to ground reduces undershoot magnitude but increase duration. In the adjustable version, the addition of a capacitor, C_FB, from the output to the adjust pin also improves the transient response.

The TPS732xx-EP does not have active pulldown when the output is overvoltage. This allows applications that connect higher voltage sources, such as alternate power supplies, to the output. This also results in an output overshoot of several percent if the load current quickly drops to zero when a capacitor is connected to the output. The duration of overshoot can be reduced by adding a load resistor. The overshoot decays at a rate determined by output capacitor C_OUT and the internal/external load resistance. The rate of decay is given by:

(Fixed voltage version)

Equation 4.

(Adjustable voltage version)

Equation 5.