Fast-Response VRM for Load Current Transitions

概要

論文の詳細を見る
A new fast-response DC-DC converter design is presented that will meet the requirements and features of the new generation of microprocessors and digital systems. The proposed fast-response inductor-switching topology is modified by the basic buck topology by replacing the output inductor with coupled inductor (primary inductance >>secondary inductance), a capacitor and the two switches. At step-up load transient, the secondary inductor with small inductance of the coupled inductor becomes the active part and increases the speed of current flow (di/dt) and reduces the voltage drop. The additional capacitor, which is parallel-connected to the coupled inductor, will suppress the overshoot during the step-down transition. Furthermore, the proposed topologies with three different coupling methods of the coupled inductor are examined. The design and simulation of the proposed topologies are verified by experimentally.
社団法人電子情報通信学会の論文
2002-10-18