A single-inductor switching DC-DC converter with five outputs and ordered power-distributive control

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An integrated five-output single-inductor multiple-output dc-dc converter with ordered power-distributive control (OPDC) in a 0.5 mu m Bi-CMOS process is presented. The converter has four main positive boost outputs programmable from +5 V to +12 V and one dependent negative output ranged from -12 V to -5 V. A maximum efficiency of 80.8% is achieved at a total output power of 450 mW, with a switching frequency of 700 kHz. The performance of the converter as a commercial product is successfully verified with a new control method and proposed circuits, including a full-waveform inductor-current sensing circuit, a variation-free frequency generator, and an in-rush-current-free soft-start method. With simplicity, flexibility, and reliability, the design enables shorter time-to-market in future extensions with more outputs and different operation requirements.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2007-12
Language
English
Article Type
Article; Proceedings Paper
Keywords

MODE

Citation

IEEE JOURNAL OF SOLID-STATE CIRCUITS, v.42, pp.2706 - 2714

ISSN
0018-9200
URI
http://hdl.handle.net/10203/6696
Appears in Collection
EE-Journal Papers(저널논문)
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