Title :
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
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;
Conference_Titel :
Solid-State and Integrated Circuits Technology, 2004. Proceedings. 7th International Conference on
Print_ISBN :
0-7803-8511-X
DOI :
10.1109/ICSICT.2004.1436880
