Title :
Design of single-inductor dual-output switching converters with average current mode control
Author :
Xu, Weiwei ; Zhu, Xiaoting ; Hong, Zhiliang ; Killat, Dirk
Author_Institution :
State Key Lab. of ASIC&Syst., Fudan Univ., Shanghai
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
An average current mode controlled single-inductor dual-output (SIDO) buck converter is presented. The outputs are specified with 1.2 V/400 mA and 1.8 V/200 mA. The proposed decoupling model helps to analyze the multi-loop system and to design the on-chip compensators. The converter has been fabricated in 0.25-mum mixed-signal process. Simulation and measurement results confirm the proposed analysis. The power efficiency is 86% at a total output power of 840 mW while the output ripples are about 40 mV at an oscillator frequency of 600 KHz.
Keywords :
current-mode circuits; mixed analogue-digital integrated circuits; oscillators; switching convertors; average current mode control; buck converter; mixed-signal process; multiloop system; on-chip compensators; oscillator frequency; output ripples; single-inductor dual-output switching converters; Application specific integrated circuits; Buck converters; Control systems; Digital control; Inductors; Laboratories; Power system modeling; Switches; Switching converters; Voltage;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746169
