A 200-mA, 93% peak power efficiency, single-inductor, dual-output DC–DC buck converter

A single-inductor dual-output (SIDO) DC–DC buck converter is presented. The circuit uses only one (external) inductor to provide two independent output voltages ranging from 1.2 V to the power supply (2.6–5 V) with a maximum total output current of 200 mA. The proposed converter has been fabricated in a 0.35-μm p-substrate CMOS technology. Measurement results demonstrate that a peak power efficiency as high as 93.3% can be achieved. An automatic substrate bias switch technique, that cancels the body effect of the p-channel output power transistors, improves the converter power efficiency performance.

[1]  Hossin Hosseinian,et al.  Power Electronics , 2020, 2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES).

[2]  Vivek De,et al.  Analysis of buck converters for on-chip integration with a dual supply voltage microprocessor , 2003, IEEE Trans. Very Large Scale Integr. Syst..

[3]  Robert W. Erickson,et al.  DC-DC converter design for battery-operated systems , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[4]  W. Liou,et al.  A High Efficiency Dual-Mode Buck Converter IC For Portable Applications , 2007, 2007 International Conference on Communications, Circuits and Systems.

[5]  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.

[6]  Robert G. Meyer,et al.  Analysis and Design of Analog Integrated Circuits , 1993 .

[7]  L.W. Linholm,et al.  An optimized output stage for MOS integrated circuits , 1975, IEEE Journal of Solid-State Circuits.

[8]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[9]  J. F. Dickson,et al.  On-chip high-voltage generation in MNOS integrated circuits using an improved voltage multiplier technique , 1976 .

[10]  Massoud Pedram,et al.  Energy Minimization Using Multiple Supply Voltages , 1997, ISLPED.

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

[12]  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.