A dual-mode buck converter with dynamic sawtooth voltage for wide input voltage range application

Yafei Xie; Xiaowu Cai; Yu Lu; Longli Pan; Jian Lu; Lei Wang; Bo Li

doi:10.1587/elex.21.20240148

LETTER

A dual-mode buck converter with dynamic sawtooth voltage for wide input voltage range application

Yafei Xie, Xiaowu Cai, Yu Lu, Longli Pan, Jian Lu, Lei Wang, Bo Li

著者情報

Yafei Xie
Institute of Microelectronics of the Chinese Academy of Sciences
University of Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Xiaowu Cai
Institute of Microelectronics of the Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Yu Lu
Institute of Microelectronics of the Chinese Academy of Sciences
University of Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Longli Pan
Institute of Microelectronics of the Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Jian Lu
Institute of Microelectronics of the Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Lei Wang
Institute of Microelectronics of the Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences
Bo Li
Institute of Microelectronics of the Chinese Academy of Sciences
Key Laboratory of Science and Technology on Silicon Devices, Chinese Academy of Sciences

キーワード: buck convertor, pulse width modulation (PWM), pulse skip modulation (PSM), wide input voltage range

ジャーナルフリー

2024 年 21 巻 12 号 p. 20240148

DOI https://doi.org/10.1587/elex.21.20240148

Browse “Advance online publication” version

詳細

抄録

A dual-mode buck converter with dynamic sawtooth voltage is presented in this paper. The proposed design can handle loads from 10mA to 1000mA by utilizing PSM and PWM modes. Moreover, there is hysteresis during mode switching from PWM to PSM to avoid the control mode fluctuating. Dynamic sawtooth voltage is used to address the line transition issue over a wide input voltage range. Implemented in 0.25µm BCD technology, this converter can generate an output voltage of 5V with an input voltage range of 10-55V. The simulated results demonstrate the proper mode transition under step-up/down load current transient. The peak efficiency is 92.57% at 90mA. The load regulation and line regulation are 1.07µV/mA and 15.2µV/V, respectively.

責任著者(Corresponding author)

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