Analysis and Experimental Results of Load Adaptive Voltage Regulator for Battery Powered Applications

Voltage regulators (VRs) efficiency improvement especially at light load currents is important in many applications including those that are battery powered and has energy consumption constrains. However, maintaining good and controlled steady-state and dynamic performance should be maintained and controlled while improving efficiency. In this paper, analytical study of VR losses and voltage ripple deviation is presented and discussed, yielding to proposed control technique, namely "pulse sliding" (PSL) control technique, which results in improved VR conversion efficiency with low and controlled voltage ripple. PSL is compared to other control methods by both analysis and experiments. Experimental results highly agree with theoretical analysis