A circuit for improving transient response for a load coupled to a voltage
regulator by employing both load current level information and the
regulator's output voltage to control a loop that provides relatively
faster and accurate regulation of the regulator's output voltage. The
circuit includes an error amplifier that is coupled to a reference
voltage and feedback resistors connected to the regulator's output
voltage. This error amplifier outputs a compensation signal that is
subsequently summed at a summing point with additional information
regarding the amount of current flowing through the load. Then, this
summed compensation signal is subsequently employed by a pulse width
modulation (PWM) comparator and other components to regulate the
regulator's output voltage with improved speed and accuracy. The circuit
can be arranged in different topologies, including buck, boost, and
buck/boost.