An Integrated Speed- and Accuracy-Enhanced CMOS Current Sensor With Dynamically Biased Shunt Feedback for Current-Mode Buck Regulators

@article{Du2010AnIS,
  title={An Integrated Speed- and Accuracy-Enhanced CMOS Current Sensor With Dynamically Biased Shunt Feedback for Current-Mode Buck Regulators},
  author={Mengmeng Du and Hoi Lee},
  journal={IEEE Transactions on Circuits and Systems I: Regular Papers},
  year={2010},
  volume={57},
  pages={2804-2814}
}
This paper presents a new compact on-chip current-sensing circuit to enable current-mode buck regulators operating at a high switching frequency for reducing the inductor profile. A dynamically biased shunt feedback technique is developed in the proposed current sensor to push nondominant poles to higher frequencies, thereby improving the speed and stability of the current sensor under a wide range of load currents. A feedforward gain stage in the proposed current sensor also increases the dc… CONTINUE READING
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