Abstract: A voltage regulator circuit can include two feedback loops, such as to reduce or suppress an unwanted transient condition in an output voltage during transient conditions such as during startup or during load current demand transients. One of the two feedback loops can include a shunt device arranged to provide a temporary current pathway during the transient condition to change current provided to a load connected to an output of the voltage regulation circuit. In addition, or instead, the voltage regulator circuit can include an open-loop regulation circuit separate from a loop corresponding to the first error amplifier. The open-loop regulator circuit can operate in a lower-power mode as compared to a closed-loop regulator circuit. A portion or an entirety of the voltage regulator circuit can be implemented in an integrated circuit, such as monolithically.

Abstract: A voltage regulator circuit can include two feedback loops, such as to reduce or suppress an unwanted transient condition in an output voltage during transient conditions such as during startup or during load current demand transients. One of the two feedback loops can include a shunt device arranged to provide a temporary current pathway during the transient condition to change current provided to a load connected to an output of the voltage regulation circuit. In addition, or instead, the voltage regulator circuit can include an open-loop regulation circuit separate from a loop corresponding to the first error amplifier. The open-loop regulator circuit can operate in a lower-power mode as compared to a closed-loop regulator circuit. A portion or an entirety of the voltage regulator circuit can be implemented in an integrated circuit, such as monolithically.