A fixed-frequency fast transient response DC–DC controller for VRMs  

作　　者：陈明阳 赵梦恋 吴晓波 

机构地区：[1]Institute of VLSI Design,Zhejiang University

出　　处：《Journal of Semiconductors》2013年第12期66-71,共6页半导体学报（英文版）

基　　金：Project supported by the Zhejiang Provincial Natural Science Foundation,China(No.LY13F040001);Analog Devices,Inc.(ADI)

摘　　要：A 2V-10A fast transient response DC-DC buck controller based on fixed frequency hysteresis control is presented. A carefully designed output voltage filter detects the output capacitor current change which helps the controller to respond immediately after load changes. Adaptive hysteresis control guarantees the switching frequency to be the same as the reference frequency by using a CCII-composed circuit and current mirrors. The controller is designed and fabricated in a TSMC 0.35 μm process. Simulation and test results show that this con- troller achieves a 20 μs settling time in one single switching cycle when load current changes from 1 A to the full load condition at 10 A.A 2V-10A fast transient response DC-DC buck controller based on fixed frequency hysteresis control is presented. A carefully designed output voltage filter detects the output capacitor current change which helps the controller to respond immediately after load changes. Adaptive hysteresis control guarantees the switching frequency to be the same as the reference frequency by using a CCII-composed circuit and current mirrors. The controller is designed and fabricated in a TSMC 0.35 μm process. Simulation and test results show that this con- troller achieves a 20 μs settling time in one single switching cycle when load current changes from 1 A to the full load condition at 10 A.

关 键 词：fast response hysteretic control BUCK 

分 类 号：TM46[电气工程—电器]