A novel method for smooth transition in step-up/step-down DC-DC converter

Author

Ma, Yanzhao ; Wang, Hongyi ; Chen, Guican ; Qu, Fan

Author_Institution

Dept. of Microelectron., Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2009

fDate

25-27 Dec. 2009

Firstpage

95

Lastpage

98

Abstract

This paper presents a step-up/step-down converter with a novel control scheme based on noninverting buck-boost converter. The control scheme is used to obtain a transition mode and implement smooth transition between buck mode and boost mode. The transition mode is adopted to improve the linearity between the output voltage and the control voltage. With the proposed control method, the output ripple voltage is significantly reduced when the input voltage is close to the output voltage. In addition, this method decreases the complexity in circuit design and enhances efficiency. The step-up/step-down converter has been designed with 0.5 Â¿m CMOS process, and can regulate an output voltage within the supply voltage ranged from 2.5 V to 5 V. The simulation results show that the output ripple voltage in the transition mode is less than 3 mV which is smaller than that in the buck mode and boost mode.

Keywords

CMOS integrated circuits; DC-DC power convertors; integrated circuit design; CMOS process; control voltage; noninverting buck-boost converter; output ripple voltage; output voltage; smooth transition; step-up/step-down DC-DC converter; transition mode; voltage 2.5 V to 5 V; Battery management systems; CMOS process; Circuit simulation; Circuit synthesis; DC-DC power converters; Energy management; Inductors; Linearity; Regulators; Voltage control; DC-DC converter; smooth transition; step-up/step-down;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2009. EDSSC 2009. IEEE International Conference of

Conference_Location

Xi´an

Print_ISBN

978-1-4244-4297-3

Electronic_ISBN

978-1-4244-4298-0

Type

conf

DOI

10.1109/EDSSC.2009.5394180

Filename

5394180