A Monolithic Capacitor-Current-Controlled Hysteretic Buck Converter With Transient-Optimized Feedback Circuit

Shih Hsiung Chien, Ting Hsuan Hung, Szu Yu Huang, Tai Haur Kuo

研究成果: Article

17 引文 斯高帕斯(Scopus)

摘要

This paper proposes a monolithic capacitor-current-controlled hysteretic buck converter with a transient-optimized feedback circuit (TOFC) for compact-sized portable devices. The proposed TOFC simultaneously optimizes both load and dynamic voltage scaling (DVS) transient responses to minimize output voltage undershoot/overshoot and settling time. In addition, a transient-hold (TH) technique, which prevents transient response optimization from being affected by the error amplifier without increasing the compensation capacitance, is also proposed to save chip area. This work is implemented in a 0.35 μm CMOS process with a chip area of 0.88 mm2. Measurement results show that, for a 500 mA load transient, the output voltage settles in 0.9 μs with an undershoot/overshoot of less than 35 mV. For a 0.6-V DVS transient, output voltage settles in 3 μs with negligible undershoot/overshoot. Moreover, 96% peak efficiency is measured at 500 mW output power.

原文English
文章編號7222481
頁(從 - 到)2524-2532
頁數9
期刊IEEE Journal of Solid-State Circuits
50
發行號11
DOIs
出版狀態Published - 2015 八月 25

    指紋

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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