This paper proposes a new adaptive ramp voltage mode control scheme. Instead of using the conventional slow compensation path of the voltage mode, the proposed scheme adds an extra feedback path to adjust the amplitude and DC-offset of the ramp signal and to directly accelerate the duty cycle according to the output voltage variation. In addition, a design-oriented analytical method is adopted to intuitively analyzes the loop characteristics and provides accurate instructions for the implementation and optimization of the compensator. A 5–1 V buck converter is implemented in the proposed adaptive ramp control scheme with optimized compensation. Simulation and measurement results show that the converter achieves a bandwidth of up to 591 kHz with a 3 MHz switching frequency and a 65° phase margin. In addition, the undershoot voltage and the recovery time are 16 mV and 19 μs with a load change from 0.5 to 1 A. The proposed control scheme shows superior transient response performance while maintaining fixed frequency operations with a simple system structure.

中文翻译：

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具有自适应斜坡控制的面向设计的快速响应电压模式降压转换器

本文提出了一种新的自适应斜坡电压模式控制方案。该方案没有使用传统的电压模式慢补偿路径，而是增加了一个额外的反馈路径来调整斜坡信号的幅度和直流偏移，并根据输出电压的变化直接加速占空比。此外，采用面向设计的分析方法，直观地分析回路特性，为补偿器的实现和优化提供准确的指导。在建议的自适应斜坡控制方案中实现了一个 5-1 V 降压转换器，并具有优化的补偿。仿真和测量结果表明，转换器在 3 MHz 开关频率和 65° 相位裕度下实现了高达 591 kHz 的带宽。此外，