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Ripple generation in buck regulator using fixed on-time control to enable the use of output capacitor having any ESR
Ripple generation in buck regulator using fixed on-time control to enable the use of output capacitor having any ESR
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机译:使用固定导通时间控制在降压调节器中产生纹波,从而可以使用具有任何ESR的输出电容器
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摘要
A buck switching regulator formed on an integrated circuit and receives an input voltage and provides a switching output voltage on a switch output node using a fixed on-time, minimum off-time feedback control scheme. The buck switching regulator includes a first capacitor and a first resistor formed on the integrated circuit where the first capacitor and the first resistor are connected in series between the switch output node and a feedback voltage node, and a second capacitor coupled between the DC output voltage node and the feedback voltage node. The first capacitor and the first resistor generate a ripple voltage signal being related to the switching output voltage and provide the ripple voltage signal to the feedback voltage node for use in the fixed on-time, minimum off-time feedback control scheme where the magnitude of the ripple voltage signal is a function of the capacitance value of the second capacitor.
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