Modeling and design of feedback loops for a voltage-mode single-inductor dual-output buck converter

In recent years, single-inductor dual-output (SIDO) converters have found applications in hand-held electronic devices. The focus of the paper is about the modeling and the design of the feedback control loop for a voltage-mode SIDO buck converter working in continuous conduction mode. A small-signal model was developed and verified by simulations and experimental results. This model is practically useful in designing the feedback compensation and predicting the closed-loop performances including circuit stability, line regulation, and output impedances.

[1]  Chi-Ying Tsui,et al.  A 1.8 V single-inductor dual-output switching converter for power reduction techniques , 2001, 2001 Symposium on VLSI Circuits. Digest of Technical Papers (IEEE Cat. No.01CH37185).

[2]  P. Mattavelli,et al.  FPGA control of SIMO DC-DC converters using load current estimation , 2005, 31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005..

[3]  Chi-Ying Tsui,et al.  A pseudo-CCM/DCM SIMO switching converter with freewheel switching , 2002, 2002 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.02CH37315).

[4]  Chi-Ying Tsui,et al.  Single-inductor multiple-output switching converters with time-multiplexing control in discontinuous conduction mode , 2003, IEEE J. Solid State Circuits.

[5]  A. Sharma,et al.  A single inductor multiple output converter with adaptive delta current mode control , 2006, 2006 IEEE International Symposium on Circuits and Systems.

[6]  C. Sreekumar,et al.  On the hybrid automaton models and control synthesis of a single inductor, double output boost converter , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[7]  Wing-Hung Ki,et al.  Single-inductor multiple-output switching converters , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[8]  L. Benadero,et al.  Investigating stability of a single inductor current mode controlled dual switching DC-DC converter , 2005, 2005 European Conference on Power Electronics and Applications.

[9]  Amit Patra,et al.  On-chip implementation of a multi-output voltage regulator based on single inductor Buck Converter topology , 2007, 20th International Conference on VLSI Design held jointly with 6th International Conference on Embedded Systems (VLSID'07).

[10]  P. Mattavelli,et al.  Digital Control of Single-Inductor Dual-Output DC-DC Converters in Continuous-Conduction Mode , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[11]  E. Bayer,et al.  A single-inductor multiple-output converter with peak current state-machine control , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[12]  S. Chattopadhyay,et al.  A Novel Control Technique for Single-Inductor Multiple-Output DC-DC Buck Converters , 2006, 2006 IEEE International Conference on Industrial Technology.

[13]  Wing-Hung Ki,et al.  Integrated charge-control single-inductor dual-output step-up/step-down converter , 2005, 2005 IEEE International Symposium on Circuits and Systems.