An integrated dual-output buck converter based on sliding mode control

The design, implementation, and testing of an integrated dual-output buck converter is presented in this paper. The proposed architecture consists of a simple, versatile, and robust hysteretic controller based on sliding mode theory. The proposed topology implements only three switches (instead of four switches in conventional solutions), and can save additional silicon area with proper design of the power switches in the voltage regulator. The IC prototype was fabricated in standard 0.5 μm CMOS technology (VTHN ≈ 0.78 V, VTHP ≈ -0.93 V), operates with an input voltage of 1.8 V, generates 1.2 V and 0.9 V output-voltage levels, and supplies a maximum current of 200 mA, reaching up to 88% efficiency.

[1]  Vadim I. Utkin,et al.  Sliding mode control in electromechanical systems , 1999 .

[2]  Yvon Savaria,et al.  Methods for minimizing dynamic power consumption in synchronous designs with multiple supply voltages , 2003, IEEE Trans. Comput. Aided Des. Integr. Circuits Syst..

[3]  Edgar Sánchez-Sinencio,et al.  Low-Power High-Efficiency Class D Audio Power Amplifiers , 2009, IEEE Journal of Solid-State Circuits.

[4]  Anantha Chandrakasan,et al.  High-efficiency multiple-output DC-DC conversion for low-voltage systems , 2000, IEEE Trans. Very Large Scale Integr. Syst..

[5]  S. Chakraborty,et al.  A novel converter topology for multiple individually regulated outputs , 2006, IEEE Transactions on Power Electronics.

[6]  Eby G. Friedman,et al.  Multi-Voltage CMOS Circuit Design: Kursun/Multi-Voltage CMOS Circuit Design , 2006 .

[7]  P. Kumar,et al.  Novel 3-switch dual output buck voltage regulator , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[8]  Eby G. Friedman,et al.  Multi-voltage CMOS Circuit Design , 2006 .

[9]  Franco Maloberti,et al.  A 200mA 93% Peak Efficiency Single-Inductor Dual-Output DC-DC Buck Converter , 2007, 2007 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.