Frequency tunable low ripple and fast response on-chip DC–DC converter for DVFS

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• 作者：K. Jagannadha Naidu ; Harish M. Kittur
• 关键词：Switched capacitor ; Switching frequency ; Phase controller ; Dutycycle and DVFS
• 刊名：Analog Integrated Circuits and Signal Processing
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：90
• 期：3
• 页码：639-644
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Circuits and Systems; Electrical Engineering; Signal,Image and Speech Processing;
• 出版者：Springer US
• ISSN：1573-1979
• 卷排序：90

文摘

Dynamic voltage and frequency scaling (DVFS) is an efficient method to reduce the power consumption in system on-chip. To support DVFS, multiple supply voltages are generated based on different work load frequencies and currents using on-chip DC–DC voltage converter. In this paper a frequency tunable multiple output voltage switched capacitor based dc–dc converter is presented. An analog to digital converter and phase controller is used in the feedback to change the switching frequency and duty cycle of the converter. An input voltage of 1.8 V is converted to 0.6 and 0.8 V for low and high signal frequency respectively. The proposed 2-phase switched capacitor architecture with gain setting of 1:2 is designed with the 90 nm technology. An output ripple of 45 mV is observed and the maximum transient response time of the converter is 17.3 ns (= 58 MHz).