Microelectronic Circuits Revised Edition
Microelectronic Circuits Revised Edition
Switching Power Supply Design
A novel low quiescent current PFM method with independent threshold for buck switching converters
Analog Integrated Circuits and Signal Processing
A fast-response pseudo-PWM buck converter with PLL-based hysteresis control
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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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 feed forward gain stage in the proposed current sensor also increases the dc loop-gain magnitude and thus enhances the accuracy of the current sensing. A current-mode buck regulator with the proposed current sensor has been implemented in a standard 0.35-µm CMOS process. Measurement results show that the proposed current sensor can achieve 95% sensing accuracy and