A CMOS hybrid control mode DC-DC buck converter for embedded system

Author

Geng, Li ; Li, Jianhuan ; Xu, Weiyang ; Li, Qinghua

Author_Institution

Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ., China

Volume

2

fYear

2004

fDate

18-21 Oct. 2004

Firstpage

1472

Abstract

A monolithic integrated CMOS DC-DC buck converter is proposed in this paper. The optimum design of the on-chip passive components is concerned to minimize the chip size of the converter. A hybrid control circuit with an easily implemented current sensing block is designed to improve the efficiency of converter having a wide load range. Design consideration, circuit implementation and corresponding simulation results are presented. Simulation results show that the DC-DC converter successfully regulates the input voltage of 3.3 V to output of 1.5 V for load currents from 100mA to 1A with the proposed technique. The maximum efficiency of 76.5% and an output ripple under 5% is achieved. All active and passive components can be fabricated onto a signal chip using the 0.5μm double-poly triple-metal CMOS technology.

Keywords

CMOS integrated circuits; DC-DC power convertors; embedded systems; integrated circuit design; 0.1 to 1 A; 0.5 micron; 1.5 V; 3.3 V; CMOS hybrid control mode; DC-DC buck converter; current sensing block; embedded system; monolithic integrated buck converter; on-chip passive components; Batteries; Buck converters; CMOS technology; Capacitors; Circuits; Control systems; DC-DC power converters; Embedded system; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on

Print_ISBN

0-7803-8511-X

Type

conf

DOI

10.1109/ICSICT.2004.1436880

Filename

1436880