Compensation Free Voltage Regulators： The Continuing Evolution of Digital Compensation

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　　電壓調節器的反饋與補償

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　　傳統的電源和電壓調節器能夠產生穩定的輸出電壓，由于納入控制回路負反饋。正確實施負反饋的一個主要挑戰是提供正確的頻率補償與反饋網絡。電壓調節器的初始實現采用控制和反饋電路的模擬電路。后來技術的改進使得數字電路能夠取代電壓調節器和電源中幾乎所有的模擬功能。數字電路的加入允許自動補償算法的發展，以減輕電力設計工程師的負擔。自動補償是一個很大的改善，比傳統的拓撲結構，但仍然有一定的局限性，由于電路的要求，以確定補償參數。數字電壓調節器控制器最近的發展創造了“無補償”的拓撲結構。這些無補償的設計提供了優越的電壓調節，同時消除了與確定補償參數相關的問題。

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　　Analog voltage regulators

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　　Analog voltage regulators require the design engineer to determine the values for compensation resistors and capacitors and then to solder these components onto the PCB. The selection， placement and modification of the discrete compensation components add delays and risks to power delivery designs. Some vendors simplify the compensation component selection process by allowing the user to select a single resistor and a single capacitor to compensate the regulator. While this option simplifies the user tasks， it reduces the probability that the resulting load current transient behavior of the power supply is acceptable. The design and implementation of analog voltage regulators is a manually-intensive process and thus carries undesirable risks and costs.

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