A voltage regulator includes a soft-start circuit, an error amplifier, an output
stage, a voltage divider, and a soft-start switch. The output stage is arranged
to provide an output voltage from an input voltage and an error signal. The voltage
divider is arranged to provide a feedback signal from the output voltage. The error
amplifier is arranged to provide the error signal from a soft-start reference voltage
and the feedback signal. The soft-start circuit is arranged to provide the soft-start
reference voltage from a reference voltage. If the voltage regulator is enabled,
the soft-start reference voltage ramps toward the reference voltage until the soft-start
reference voltage reaches the reference voltage. The soft-start switch is coupled
across the inputs of the error amplifier. If the voltage regulator is disabled,
the soft-start switch is closed. Closing the soft-start switch causes the soft-start
reference voltage to track the decaying output voltage during disable.