【产品】1MHz恒定导通时间（COT）控制模式的同步降压DC-DC转换器TMI3252/S/TH，输出电流可达2A

时间： 2020-10-23 来源：西安拓尔

技术问答

西安拓尔推出的TMI3252H、TMI3252SH和TMI3252TH是高效率、1MHz恒定导通时间（COT）控制模式的同步降压DC-DC转换器，可输出高达2A的电流。集成了主开关和同步开关，导通电阻（R_DS(ON)）较低，降低了传导损耗；开关频率为1MHz，输出电压纹波低，可减小外部电感器和电容器的尺寸；采用COT架构，实现快速瞬态响应，适合高压降压应用；仅需少数现有的标准外部元件，采用符合RoHS标准的6引脚SOT23-6封装。

产品特点

· 集成低导通电阻（140mΩ/70mΩ）FET

· 高效率的同步模式工作

· 宽输入电压范围：4.5V~18V

· 最小输出电压：

0.8V（TMI3252H）

0.6V（TMI3252SH）

0.765V（TMI3252TH）

· 开关频率：1MHz

· 输出电流可达2A

· 采用COT控制，具有快速瞬态响应

· 轻载时采用省电模式

· 集成内部补偿

· 使用低ESR陶瓷输出电容器实现稳定工作

· 打嗝模式的过流保护

· 热关断

· 浪涌电流限制和软启动

· 输入过压保护

· 采用SOT23-6封装

应用领域

· 数字机顶盒

· 平板电视和显示器

· 笔记本电脑

· 无线和DSL调制解调器

参数表

典型应用电路：（R2阻值不同）

TMI3252H典型应用电路

TMI3252SH典型应用电路

TMI3252TH典型应用电路

效率曲线图

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本文由宝丁翻译自西安拓尔，版权归世强硬创平台所有，非经授权，任何媒体、网站或个人不得转载，授权转载时须注明“来源：世强硬创平台”。

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【选型】应能微TVS/半导体放电管/MOSFET/电源管理IC(PMIC)/过压保护设备(OVP)/DC-DC同步降压转换器选型指南

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