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TMI TMI3331
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3331
- Type
- TMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3331
- Electronic Component
- 1
- Package
- ESOP-8
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.105g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0227125667
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 8V~30V
- Switching Frequency
- 130kHz~500kHz
- 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.
TMI3331 降压型开关稳压器产品概述
一、产品简介
TMI3331 是拓尔微（TMI）推出的一款降压型（Buck）同步整流开关稳压器，采用 ESOP-8 封装，适合 8V~30V 宽输入电压范围的单路降压应用。器件集成高侧/低侧开关管，支持外部反馈实现可调输出，最大持续输出电流可达 3A，静态电流仅 1mA，适用于对效率和待机功耗有要求的电源设计。
二、主要特性
- 输入电压范围：8V ~ 30V
- 输出电流：最高 3A（连续）
- 拓扑结构：降压式（同步整流）
- 开关频率：可在 130kHz ~ 500kHz 范围内工作，支持外部或内部频率设定
- 同步整流：内置低阻 MOSFET，提高轻载与重载效率
- 静态电流 Iq：约 1mA（低功耗待机）
- 输出类型：外部反馈可调，适配多种输出电压需求
- 开关管：内部集成（无需外置功率开关）
- 工作结温：-40℃ ~ +125℃（TJ）
- 封装：ESOP-8，利于散热与 PCB 布局
三、典型应用场景
- 工业控制与自动化（24V 总线降压）
- 通信设备电源模块
- 嵌入式系统与单板计算机电源
- 仪器仪表、安防设备和车载电子（需考虑车规验证）
- LED 驱动与分立电源管理模块
四、性能与设计要点
- 效率：同步整流与内置开关管设计在中高电流工况下可获得较高效率，降低发热与外部元件需求。
- 频率选择：130kHz~500kHz 的可调开关频率在效率与外部电感/电容尺寸之间提供权衡。较高频率利于减小电感体积，但会增加开关损耗。
- 可调输出：通过外部电阻分压反馈网络精确设置输出电压，支持点位稳压与多通道系统电源分配。
- 低静态电流：1mA 静态电流有利于系统待机功耗控制，适合需低待机损耗的设备。
五、应用与布局建议
- 电感与输出电容选型应满足最大 3A 连续输出及所选开关频率的纹波和峰值电流要求；优先使用低 ESR 电容以降低输出纹波。
- 输入旁路：在靠近器件的 VIN 引脚放置适量的陶瓷旁路电容，抑制上升沿噪声与环路振荡。
- 布局注意：大电流回路（开关节点、功率地）尽量短而宽，MOSFET 与感性元件之间保持紧凑布局，信号地与功率地合理分离并在单点汇流。
- 散热：ESOP-8 包装需通过 PCB 热铜箔与过孔改善结到环境的散热路径，保证在高温或高负载下可靠工作。
六、可靠性与保护
- 常见保护功能（需以数据手册为准）：过流保护（OCP）、过温保护（OTP）、欠压锁定（UVLO）等，保障异常工况下系统安全。
- 工作温度范围覆盖工业级（-40℃ ~ +125℃ TJ），适合较苛刻环境。为保证长期可靠性，建议在极端温度下验证功率与热设计裕量。
七、采购与技术支持
TMI3331 适合用于需要高效率、低待机功耗且输入电压较宽的单路降压电源设计。设计前请参考拓尔微官方资料与完整数据手册，确认具体引脚定义、保护阈值与典型应用电路，以便在实际 PCB 及系统级验证中达到预期性能。
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