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TMI TMI3493
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3493
- Type
- TMI
- Minimum package
- 3000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3493
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.15g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0258763891
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 4.3V~36V
- Switching Frequency
- 75kHz~600kHz
- Electronic Component
- Electronic Component
- Output Current
- 3A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TMI3493 产品概述
一、主要参数与功能概览
TMI3493 是一款降压型（Buck）同步整流开关稳压器，核心规格如下：输入电压范围 4.3V ~ 36V，连续输出电流可达 3A，开关频率可在 75kHz ~ 600kHz 范围内工作，工作结温范围 -40℃ ~ +125℃(TJ)。器件为单通道、降压拓扑，内部集成开关管（内置 MOSFET），静态工作电流仅约 1mA，输出为可调型，封装为 SOP-8。同步整流结构提高转换效率并降低外部肖特基需求。
二、性能亮点与系统优势
- 宽输入电压范围覆盖常见汽车、工业与通信电源输入场景；内置开关管简化外部元件。
- 同步整流带来更高效率，特别在中高负载时效率优势明显，有利于热管理。
- 可调输出通过外部反馈电阻设定，适配多种输出电压需求；静态电流低，利于低功耗待机设计。
- 可选的开关频率范围允许在效率、体积与噪声之间权衡：高频利于减小磁性元件尺寸，低频有利于提升效率和降低开关损耗。
三、典型应用场景
- 工业控制与分布式电源模块
- 汽车电子（符合输入电压范围前提）
- 通信设备、路由器与机顶盒的点对点电源
- 电池管理与便携式设备的中高功率降压
四、典型设计建议（布局与器件选择）
- 输入/输出电容：优先低 ESR 的陶瓷电容，输入电容尽量靠近 VIN 与 GND 脚引脚，减小开关回路环路面积。
- 电感：根据输出电流与占空比选择合适电流额定值与饱和电流裕量，频率高时可选体积更小的磁芯。
- 输出取样：可调输出需通过外部电阻分压到 FB 引脚，布局尽量短且远离开关节点以保证精度。
- 开关节点与回流回路：保持最短与最小回路面积，减小 EMI 与热损耗。
- 保护与滤波：系统侧建议配置输入浪涌保护与输出滤波以提高可靠性。
五、热设计与封装注意
SOP-8 封装热阻相对中等，长时间 3A 输出时需关注封装温升与 PCB 散热，建议增加散热铜箔（下方与周围）并优化热过孔以提升导热。工作环境高温时应评估降额运行或采用散热措施。
六、系统级选型建议
在选型时结合系统输入电压、最大输出电流、允许的纹波与效率需求决定开关频率与电感尺寸；若需更高功率或更小封装，可考虑并联或替代器件。设计验证阶段进行热仿真与整机 EMI 测试，确保长期可靠性与性能稳定。
如需参考典型应用电路或 PCB 布局示意，可以提供具体输入/输出电压与负载条件，我可进一步给出元件选型与布局建议。
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