一种双控制模式的同步降压型DC/DC转换器  

A Synchronous Buck DC/DC Converter with Dual Control Modes

作　　者：李新[1] 佟宇航 高从勇 LI Xin;TONG Yuhang;GAO Congyong(School of Information Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870

出　　处：《微处理机》2024年第4期12-16,共5页Microprocessors

摘　　要：为突破转换器在输出电容选型上的局限性,保证转换器快速的负载瞬态响应,基于自适应恒定导通时间控制的两种控制模式,提出一种可根据输出电容类型选择控制模式的同步降压型DC/DC转换器。在D-CAP模式下,支持具有适当等效串联电阻的电容等作为输出电容;在电流模式下,支持等效串联电阻较低的陶瓷电容作为输出电容。基于0.35μm BCD工艺,使用Cadence软件对转换器进行瞬态仿真。结果表明,该设计在两种模式下都具有快速的瞬态响应。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 0.35μm 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.

关 键 词：自适应恒定导通时间控制 直接电容感应控制 快速瞬态响应 

分 类 号：TN402[电子电信—微电子学与固体电子学]