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Title: Reset-sensing quasi-V2 single-inductor multiple-output buck converter with reduced cross-regulation
Authors: Lee, ATL
Tan, SC
Hui, SY
Chan, PCH 
Sin, JKO
Keywords: Cross-Regulation
Discontinuous conduction mode (DCM)
Reset-Sensing Quasi-V2 control
Single-Inductor multiple-output (SIMO)
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers Inc.
Source: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, 2015, 7104461, p. 935-940 How to cite?
Abstract: This paper proposes a reset-sensing quasi-V2 single-inductor multiple-output (SIMO) converter with minimal cross-regulation. The conventional quasi-V2 sensing scheme in SIMO converters suffers from serious cross-regulation which is primarily induced by the load differentiation with unbalanced loads. It is shown that the proposed reset-sensing quasi-V2 control scheme can significantly reduce cross-regulation by completely discharging the feed-forward sensing node to zero volts during the idle phase in Discontinuous Conduction Mode (DCM). The cross-regulation with the conventional quasi- V2 single-inductor dual-output (SIDO) converter for a load current step of 150 mA is experimentally verified to be more than 1.25 mV/mA. By employing the proposed quasi- V2 control method, the experimental results demonstrate that the cross-regulation for a load current step of 150 mA is significantly reduced to within 0.087 mV/mA. Hence, with the proposed scheme, a load transient in one output will have a minimal effect on the DC operating point of another output. This enables separate current control at each individually-driven output of a SIMO converter.
Description: 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015, 15-19 March 2015
DOI: 10.1109/APEC.2015.7104461
Appears in Collections:Conference Paper

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