A Synchronous Buck DC/DC Converter with Dual Control Modes
In order to break through the limitation of output capacitor selection and ensure fast load transient response of the converter,based on two control modes of adaptive constant on-time control,a synchronous buck DC/DC converter is proposed,which can select the control mode according to the output capacitor type.In D-CAP mode,capacitors with appropriate equivalent series resistance are supported as output capacitors.In current mode,ceramic capacitors with low equivalent series resistance are supported as output capacitors.Based on the 0.35 μm BCD process,the transient simulation of the converter is carried out by Cadence software.The results show that the design has fast transient response in both modes.
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