Quadratic Differential and Integration Technique in $V^{2}$ Control Buck Converter With Small ESR Capacitor

This paper proposes a quadratic differential and integration (QDI) technique for the design of V 2 control buck converters with small equivalent series resistance (ESR) of the output capacitor. The QDI technique, which eliminates the use of large ESR in the V 2 control structure, achieves the fast transient response with the small output voltage variation in transient period. Besides, the precise sensing signal is derived from the QDI circuit without the unwilling ESR-related distortion. Moreover, the loop analysis demonstrates that the proposed QDI circuit and the proportional and integral compensator can generate the compensation zero pair to stabilize the system. Experimental results show that the output voltage has small voltage ripple opposite to the conventional V 2 control. In load transient period, the overshoot/undershoot voltage is smaller than 40 mV when output voltage is 2 V, and the transient recovery time inheriting the advantage of V 2 control is shorter than 9 ¿s with the load step from 100 to 400 mA and vice versa. The highest full chip power conversion efficiency is about 93%.

[1]  Jianping Xu,et al.  Small-signal model of V/sup 2/ control technique with compensation , 2004, 2004 International Conference on Communications, Circuits and Systems (IEEE Cat. No.04EX914).

[2]  Jiin-Chuan Wu,et al.  A Monolithic Current-Mode Buck Converter With Advanced Control and Protection Circuits , 2007, IEEE Transactions on Power Electronics.

[3]  Mei-Ling Yeh,et al.  A High Efficiency Dual-Mode Buck Converter IC For Portable Applications , 2008, IEEE Transactions on Power Electronics.

[4]  Ke-Horng Chen,et al.  Low-Ripple and Dual-Phase Charge Pump Circuit Regulated by Switched-Capacitor-Based Bandgap Reference , 2009, IEEE Transactions on Power Electronics.

[5]  W. Huang A new control for multi-phase buck converter with fast transient response , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[6]  S. Ziegler,et al.  Lossless Inductor Current Sensing Method With Improved Frequency Response , 2009, IEEE Transactions on Power Electronics.

[7]  Jian Li,et al.  Modeling of V 2 Current-Mode Control , 2009, APEC 2009.

[8]  Ke-Horng Chen,et al.  Adaptive Pole-Zero Position (APZP) Technique of Regulated Power Supply for Improving SNR , 2008, IEEE Transactions on Power Electronics.

[9]  Ke-Horng Chen,et al.  Dithering Skip Modulation, Width and Dead Time Controllers in Highly Efficient DC-DC Converters for System-On-Chip Applications , 2007, IEEE Journal of Solid-State Circuits.

[10]  Song Qu,et al.  Modeling and design considerations of V/sup 2/ controlled buck regulator , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[11]  Ke-Horng Chen,et al.  Bidirectional Current-Mode Capacitor Multipliers for On-Chip Compensation , 2008, IEEE Transactions on Power Electronics.

[12]  G.A. Rincon-Mora,et al.  Current-sensing techniques for DC-DC converters , 2002, The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002..

[13]  Yu-Kang Lo,et al.  Dual-Current Pump Module for Transient Improvement of Step-Down DC–DC Converters , 2009, IEEE Transactions on Power Electronics.

[14]  G. Schuellein,et al.  Current sharing of redundant synchronous buck regulators powering high performance microprocessors using the V/sup 2/ control method , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[15]  Jian Li,et al.  Modeling of ${\rm V}^{2}$ Current-Mode Control , 2010, IEEE Transactions on Circuits and Systems I: Regular Papers.

[16]  Lon-Kou Chang,et al.  Analysis and Modeling of On-Chip Charge Pump Designs Basedon Pumping Gain Increase Circuits With a Resistive Load , 2008, IEEE Transactions on Power Electronics.

[17]  Jian Sun Characterization and performance comparison of ripple-based control for voltage regulator modules , 2006, IEEE Transactions on Power Electronics.

[18]  Fred C. Lee,et al.  Modeling of V2 Current-Mode Control , 2010, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[19]  A. Khambadkone,et al.  A Buck-Derived Topology With Improved Step-Down Transient Performance , 2008, IEEE Transactions on Power Electronics.

[20]  José Silva-Martínez,et al.  A frequency compensation scheme for LDO voltage regulators , 2004, IEEE Transactions on Circuits and Systems I: Regular Papers.

[21]  Philip K. T. Mok,et al.  A Constant Frequency Output-Ripple-Voltage-Based Buck Converter Without Using Large ESR Capacitor , 2008, IEEE Transactions on Circuits and Systems II: Express Briefs.

[22]  Bin Wang,et al.  Comparison Study of Switching DC-DC Converter Control Techniques , 2006, 2006 International Conference on Communications, Circuits and Systems.