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A peak-current controlled single-inductor dual-output DC-DC buck converter with a time-multiplexing scheme

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3 Author(s)
Wei-Hsun Chang ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Jia-Hui Wang ; Chien-Hung Tsai

This paper presents a peak current-controlled (PCC) single-inductor dual-output (SIDO) DC-DC buck converter with a time-multiplexing (TM) scheme. Small signal modeling, system compensation, and circuit implementation are discussed. Simulation and measurements confirm the effectiveness of the proposed method. The converter was fabricated using TSMC 0.35-μm CMOS technology. The input supply voltage is from 2.7~4.2V. Two outputs are specified at 2.5V/36mA and 1.8V/20mA, respectively, and operated at 500 KHz with a 1-μH inductor and 20-μF capacitors.

Published in:

VLSI Design Automation and Test (VLSI-DAT), 2010 International Symposium on

Date of Conference:

26-29 April 2010