For this design example, the 3.3-V, fixed-version TLV76133 is selected and is powered by a standard 12-V input supply. The dropout voltage (V_DO) is kept within the TLV761 dropout voltage specification for the 3.3-V output voltage option to keep the device in regulation under all load and temperature conditions for this design. A 1.0-µF output capacitor is recommended for excellent load transient response. The input capacitor is optional and is used to reduce the input impedance of the circuit and improve the transient response.

As with any regulator, increasing the size of the output capacitor reduces overshoot and undershoot magnitude.