A Single-Inductor Multiple-Output Auto-Buck-Boost DC-DC Converter With Tail-Current Control

• Published in: IEEE transactions on power electronics Vol. 31; no. 11; pp. 7857 - 7875
• Main Authors: Yanqi Zheng, Ho, Marco, Jianping Guo, Ka Nang Leung
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.11.2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: auto-buck-boost; Channels; CMOS; Control algorithms; Controllers; cross-regulation; DC to DC; DC-DC power converters; Electric converters; Electric currents; Electronic mail; Electronics; Energy efficiency; Frequencies; Inductors; MOSFET; SIMO dc-dc converter; Switches; Switching; Switching frequency; tail-current control; Tracking; Transformers; Auto-buck–boost; single inductor multiple output (SIMO) dc–dc converter; tail-current control; cross regulation
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2015.2512619

A single-inductor multiple-output (SIMO) auto-buck-boost dc-dc converter with proposed tail-current control to achieve fast and robust reference tracking of inductor current is proposed in this paper. Moreover, the proposed backward-V x1 control algorithm and frequency-control loop enable the proposed SIMO dc-dc converter to operate at a fixed switching frequency and achieve high power-conversion efficiency in both the buckdominated and boost-dominated cases. The proposed SIMO auto-buck-boost dc-dc converter has four output channels and is implemented in a standard 0.35-μm CMOS process. Measurement results show that the proposed dc-dc converter achieves a peak efficiency of more than 91% at a total output power of about 0.5 W and load transient response time of less than 80 μs.