An integrated CMOS current-sensing circuit for low-Voltage current-mode buck regulator

  title={An integrated CMOS current-sensing circuit for low-Voltage current-mode buck regulator},
  author={Chi Yat Leung and Philip K. T. Mok and Ka Nang Leung and Mansun Chan},
  journal={IEEE Transactions on Circuits and Systems II: Express Briefs},
An integrated current-sensing circuit for low-voltage buck regulator is presented. The minimum achievable supply voltage of the proposed current-sensing circuit is 1.2 V implemented in a CMOS technology with V/sub TH/=0.85 V, and the current-sensing accuracy is higher than 94%. With the developed current-sensing circuit, a buck regulator, which is able to operate at a 1.2-V supply, is implemented. A maximum output current of 120 mA and power-conversion efficiency higher than 89% are achieved. 
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