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

fYear

2008

fDate

Nov. 30 2008-Dec. 3 2008

Firstpage

902

Lastpage

905

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APCCAS.2008.4746169

Filename

4746169