Single inductor dual output buck converter

Electrical transmission or interconnection systems – Plural supply circuits or sources – Plural converters

Reexamination Certificate

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Reexamination Certificate

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10714103

ABSTRACT:
A single-inductor dual-output buck converter facilitates power conversion by converting a single DC power source/supply into two separate DC outputs, each of which can be configured to provide a selected/desired voltage. The converter includes a single inductor and three power switches, which control operation of the converter. The converter has four basic stages of operation in which power is initially supplied to a first output that also stores charge. Subsequently, the stored charge of the first output is employed to provide power to a second output.

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patent: 6075295 (2000-06-01), Li
patent: 6215288 (2001-04-01), Ramsey et al.
patent: 6222352 (2001-04-01), Lenk
patent: 6522110 (2003-02-01), Ivanov
patent: 2003/0030326 (2003-02-01), Shenai et al.
“High-Efficiency Multiple-Output DC—DC Conversion for Low-Voltage Systems”, Abram P. Dancy, Rajeevan Amirtharajah and Anantha P. Chandrakasan, IEEE Transactions on Very Large Scale Integration (VLSI) Systems. vol. 8. No. 3. Jun. 2000. pp. 252-263.
“Single-Inductor Multiple-Output Switching Converters With Time-Multiplexing Control in Discontinuous Conduction Mode”, Dongsheng MA, Wing-Hung Ki, Chi-Ying Tsui and Philip K.T. Mok. IEEE Journal of Solid State Circuits. vol. 38. No. 1. Jan. 2003. pp. 89-100.
“23.1 A Synchronous Dual—Output Switching dc—dc Converter Using Multibit Noise-Shaped Switch Control”, Marcus W. May, Michael R. May and John E. Willis, ISSCC 2001/Session 23/ Analog Techniques, IEEE International Solid-State Circuits Conference. Feb. 7, 2001. 2 pgs.

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