A fully integrated buck converter with a novel digital soft-start circuit

作者：Zhang, Zhang; Song, Mingxin; Wang, Xing; Cheng, Zhengxi; Xie, Guangjun^*

来源：Australian Journal of Electrical and Electronics Engineering, 2016, 13(2): 91-95.

DOI：10.1080/1448837X.2015.1092998

• Buck converters
• CMOS processs
• Fully integrated
• In-rush current
• On-chip circuits
• Output voltages
• Overshoot voltage
• Start-up phase

A novel digital soft-start circuit in the fully integrated buck converter is presented in this paper. The soft-start approach based on a linearly ramped-up reference is proposed to prevent massive in-rush current and overshoot voltage during the start-up phase of the buck converter. Compared with conventional soft-start circuit, the novel circuit is realized by a compact on-chip circuit that requires no external pins and is very simple as well. A fully integrated DC–DC buck converter with proposed circuit has been based on a 0.18 μm mixed signal CMOS process. The results show that this novel soft-start enables the output voltage of the converter to be linearly ramped up to the steady state.

• 出版日期2016
• 单位合肥工业大学; 复旦大学