Single-Inductor Multiple-Output DC-DC Converter with Comparator-Based Feedback Circuit
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In this paper, a single-inductor multiple-output (SIMO) DC-DC converter with comparator based feedback circuit is proposed. The proposed SIMO converter does not need feedback loop which is composed of error amplifier or OTA and its compensation network. Therefore, tolerance of the feedback loop is improved since it does not suffer the variation of compensation resistor and capacitor. Also, variation of loop characteristic arises from external inductor value, capacitor value and load current can be removed. The measured peak power conversion efficiency is 81% when the output power is 140mW.
Abstract
In this paper, a single-inductor multiple-output (SIMO) DC-DC converter with comparator based feedback circuit is proposed. The proposed SIMO converter does not need feedback loop which is composed of error amplifier or OTA and its compensation network. Therefore, tolerance of the feedback loop is improved since it does not suffer the variation of compensation resistor and capacitor. Also, variation of loop characteristic arises from external inductor value, capacitor value and load current can be removed. The measured peak power conversion efficiency is 81% when the output power is 140mW.
참고문헌 (5)
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- C. F. Lee, "A monolithic current mode CMOS DC-DC converter with on-chip current sensing technique", IEEE J. Solid-State Circuits, 39(1), pp.3~14 (2004)