Control-loop design for three-loop voltage regulators with adaptive voltage position control

This paper proposes the control loop design for the three-loop voltage regulator (VR) to achieve adaptive voltage position control. A y-parameters model for the VR with current-mode controlled active droop method is introduced to simplify the original three-loop system to a two-loop system. Therefore the compensation network design becomes much simple. Following the theoretical analysis, simulation and experimental results demonstrate very good VR transient response.