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DC/DC轉換器是將輸入電壓轉換後能有效輸出固定電壓的電壓轉換器。 DC/DC轉換器分為升壓DC/DC轉換器、升壓DC/DC轉換器和升壓DC/DC轉換器三大類。

可根據需要採用三種控制方式。 PWM控制方式效率高，輸出電壓紋波和噪聲好。 PFM 控制型即使長時間使用也具有低功耗的優點，特別是在小負載的情況下。

PFM控制在PWM/PFM轉換為小負載時進行，當出現重負載時自動轉換為PWM控制。目前，DC-DC轉換器廣泛應用於手機、MP3、數位相機、便攜式媒體播放器等產品中。在電路類型分類中屬於斬波電路。

DC/DC converter is a voltage converter which can effectively output fixed voltage after converting input voltage. DC/DC converters are divided into three categories: boost DC/DC converters, boost DC/DC converters and boost DC/DC converters.

Three kinds of control can be adopted according to the demand. PWM control type has high efficiency and good output voltage ripple and noise. PFM control type has the advantage of low power consumption even if it is used for a long time, especially under small load.

PFM control is implemented when PWM/PFM converts to small load, and it is automatically converted to PWM control when heavy load occurs. At present, DC-DC converters are widely used in mobile phones, MP3, digital cameras, portable media players and other products. It belongs to chopper circuit in the classification of circuit types.