| Citation: |
Chen Dongpo, He Lenian, Yan Xiaolang. A Current-Mode DC-DC Buck Converter with High Stability and Fast Dynamic Response[J]. Journal of Semiconductors, 2006, In Press.
Chen D P, He L N, Yan X L. A Current-Mode DC-DC Buck Converter with High Stability and Fast Dynamic Response[J]. Chin. J. Semicond., 2006, 27(10): 1742.
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A Current-Mode DC-DC Buck Converter with High Stability and Fast Dynamic Response
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Abstract
A current-mode DC-DC buck converter with high stability is presented.The loop gain’s expression of the current-mode converter is derived by employing an advanced model of a current-mode control converter.After analyzing the loop gain’s expression,which illustrates the method of selecting suitable frequency compensation for the control loop,a novel pole-zero tracking frequency compensation is proposed.Based on theoretical analysis,a DC-DC buck converter with high stability is designed with 0.5μm-CMOS technology.The simulated results reveal that the stability of the converter is independent of the load current and the input voltage.Moreover,the converter provides a full load transient response setting time of less than 5μs and overshoots and undershoots of less than 30mV. -
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