A Novel On-chip Current-Sensing Structure for Current-mode DC-DC Converter

被引：0
|
作者：
Wang, Hongyi [1 ]
Hu, Xi [1 ]
Liu, Quanfeng [1 ]
Zhao, Gangdong [1 ]
Luo, Dongzhe [1 ]
机构：
[1] Xi An Jiao Tong Univ, Elect & Informat Engn Dept, 28 Xianning West St, Xian, Shaanxi Provinc, Peoples R China
来源：
2013 INTERNATIONAL SYMPOSIUM ON VLSI DESIGN, AUTOMATION, AND TEST (VLSI-DAT) | 2013年
基金：
中国国家自然科学基金;
关键词：
High-speed current-sensing; Compensation ramp; Current-mode control; DC-DC converter; PVTL; BUCK CONVERTER;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel current-sensing structure for current-mode DC-DC converter is presented in this paper. It has significant improvements on current-sensing speed and reducing the sensitivity to the variations of the process, voltage, temperature and loading (PVTL), which is derived in detail. It has been used in a current-mode DC-DC converter fabricated by CSMC 0.5 mu m CMOS process with a die size of 2.25 mm2. Experimental results show that with the current-sensing circuit the converter can operate at the supply voltage range of 2.7 to 5.5V with loading 0-600mA and has the ability to convert from 5.5V down to 0.6V at 4MHz. The measured transient response time is 7 mu s as the load current changes between 0 and 600mA rapidly. Moreover, the current-sensing structure can be also used in other integrated circuits for loop control and over-current protection.
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页数：4
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