Title :
A single-inductor multiple-bipolar-output (SIMBO) converter with fully-adaptive feedback matrix and improved light-load ripple
Author :
Xu, Weiwei ; Li, Ye ; Hong, Zhiliang ; Killat, Dirk ; Schleifer, Horst
Author_Institution :
State Key Lab. of ASIC & Sys., Fudan Univ., Shanghai, China
Abstract :
Specified for one output channel 1V to 4V, the second one 1.8V to 4V and the last one 0V to -1.8V, a prototype of single-inductor multiple-bipolar-output (SIMBO) DC-DC converter performed on 0.25-μm CMOS mixed signal process is presented. Fully-adaptive feedback matrix in pulse-width modulation (PWM) control to suppress cross regulation and constant-voltage-ripple pulse-frequency modulation (PFM) control to achieve fair light-load ripple for various conversion mode and wide-range conversion ratio are proposed. This converter can automatically switch between PWM and PFM control. The peak conversion efficiency is close to 90%.
Keywords :
CMOS integrated circuits; DC-DC power convertors; PWM power convertors; matrix algebra; CMOS mixed signal process; PFM control; PWM control; constant-voltage-ripple pulse-frequency modulation control; cross regulation suppression; fully-adaptive feedback matrix; light-load ripple; pulsewidth modulation control; single-inductor multiple-bipolar-output DC-DC converter; voltage 0 V to -1.8 V; voltage 1 V to 4 V; wide-range conversion ratio; Inductors; Matrix converters; Pulse width modulation; Steady-state; Switches; Voltage control;
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
DOI :
10.1109/ESSCIRC.2011.6045000
