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TMI TMI3255SF
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3255SF
- Type
- TMI
- Minimum package
- 3000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3255SF
- Electronic Component
- 1
- Package
- SOT-23-6
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.098g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0229963930
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 4.5V~18V
- Switching Frequency
- 600kHz
- Electronic Component
- Electronic Component
- Output Voltage
- 1V~5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TMI3255SF 产品概述
一、概览
TMI3255SF 是拓尔微（TMI）推出的一款高集成度降压型同步整流开关稳压器，采用 SOT-23-6 小封装，内置开关管，适用于对体积、效率和成本有较高要求的点对点供电场合。器件支持可调输出、600kHz 固定开关频率，输入电压范围宽（4.5V ~ 18V），单通道输出电流最高可达 5A，结末工作温度可达 -40℃ ~ +125℃（TJ），静态电流仅 600μA，兼顾待机功耗与高负载性能。
二、主要特性
- 输出类型：可调（外接分压器设定输出电压）
- 拓扑结构：降压（Buck），同步整流，提升效率并减小外部二极管需求
- 开关频率：600kHz，利于使用小体积电感与输出滤波电容
- 输入电压：4.5V ~ 18V，适配多种电源域（如单节锂电、12V/24V 总线等）
- 最大输出电流：5A（受散热与外设影响）
- 静态电流（IQ）：600μA，适合需要低待机功耗的应用
- 封装：SOT-23-6，体积小但需注意散热设计
- 工作温度：-40℃ ~ +125℃（器件结温范围）
三、典型功能与保护
TMI3255SF 面向点负载电源，通常具有以下功能（具体以器件手册为准）：
- 软启动功能，减少开机浪涌电流与输出过冲
- 过流保护（周期内限流或峰值限制）与短路保护
- 过温关断与自动恢复，保障长期可靠性
- 使能/关断控制，便于功耗管理
四、应用场景
- 工业控制与通讯设备的点对点稳压
- 车载电子（需注意是否满足车规认证）和 12V/24V 总线供电模块
- 网络设备、机顶盒、路由器的局部降压
- 电池供电类设备及便携终端的高效率电源管理
五、设计注意事项与建议
- 电感选择：600kHz 频率允许使用小体积电感，常见取值范围可为 0.47μH ~ 2.2μH，具体由输出电流纹波与效率折中决定。
- 输出电容：选择低 ESR 的陶瓷或混合电容以控制输出纹波和保证瞬态响应。
- 布局与散热：SOT-23-6 封装散热能力有限，建议在 PCB 下方和周围做好铜箔散热、尽量缩短高电流回路（输入电容—开关—电感—输出电容）走线。
- 输出设置：通过外接分压器设置输出电压，注意元件精度与温漂对稳压精度的影响。
- EMI 抑制：高频开关工作时注意布线与差分回路，必要时加放电阻、共模滤波或屏蔽以减少干扰。
六、总结
TMI3255SF 在小封装下集成了同步整流降压功能，兼顾高达 5A 的输出能力与较低的静态电流，适合对体积和效率有要求的中小功率点负载场合。设计时需重视外部电感、电容的选型及 PCB 热管理，以充分发挥器件的性能。详细电气参数、管脚定义、典型应用电路与保护行为请以厂商数据手册为准。
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