Title :
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
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 ¿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;
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
DOI :
10.1109/EDSSC.2009.5394180
