A digital dc-dc buck converter with adaptive on-time PWM/PFM control

Chun Hsiao Teng, Chien-Hung Tsai

研究成果: Conference contribution

摘要

A buck converter with digital adaptive on-time (AOT) control that achieves a fast load transient response is proposed in this paper. The proposed digital inductor current ramp estimator circuit can not only allow the switching regulator to achieve a fast transient response, but also operate stably without a high cost output voltage sampling analog-to-digital converter (ADC). The digital AOT controller which adjusting the on-time according to the supply voltage and different reference voltage conditions can achieve pseudo-fixed switching frequency in the continuous conduction mode (CCM). And the conversion efficiency under ultralight-load conditions can be improved by working in the discontinuous conduction mode (DCM). The measurement results show that the buck converter can operate under load current between 10 mA and 600 mA for the supply voltage from 2.7V to 4.2 V and the output voltage range from 0.8 V to 1.2 V. The recovery time is 30 μs when the load current varies from 10 mA to 600 mA. The peak efficiency is 94.66 % at 50 mA.

原文English
主出版物標題Proceedings - 2014 IEEE 12th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2014
編輯Jia Zhou, Ting-Ao Tang
發行者Institute of Electrical and Electronics Engineers Inc.
ISBN(電子)9781479932962
DOIs
出版狀態Published - 2014 一月 23
事件2014 12th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2014 - Guilin, China
持續時間: 2014 十月 282014 十月 31

出版系列

名字Proceedings - 2014 IEEE 12th International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2014

Other

Other2014 12th IEEE International Conference on Solid-State and Integrated Circuit Technology, ICSICT 2014
國家China
城市Guilin
期間14-10-2814-10-31

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering
  • Computer Science Applications

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