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TMI TMI33431
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI33431
- Type
- TMI
- Minimum package
- 3000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI33431
- Electronic Component
- 1
- Package
- SOP-8
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.179g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0258500774
- Operating Temperature
- 40℃~+150℃
- Operating Voltage
- 4.5V~30V
- Switching Frequency
- 570kHz
- Electronic Component
- Electronic Component
- Output Current
- 2.5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TMI33431 产品概述
一、产品简介
TMI33431 是拓尔微（TMI）推出的一款降压型同步整流开关稳压器，采用降压拓扑并集成功率开关管，工作电压范围宽（4.5V～30V），可提供最高2.5A输出电流，开关频率为570kHz，输出为可调型，适用于对效率、体积和成本有综合要求的电源设计。器件工作温度覆盖广（-40℃～+150℃），封装为 SOP-8，便于批量生产与手工焊接。
二、主要参数与特性
- 功能类型：降压型（Buck），同步整流（内置下管）
- 输入电压：4.5V ～ 30V
- 输出电流：最高 2.5A（连续）
- 开关频率：570kHz（固定）
- 输出类型：可调（通过外部分压电阻设置输出电压）
- 开关管：内置高/低端MOSFET，降低外部器件复杂度
- 工作温度：-40℃ ～ +150℃
- 封装：SOP-8（适合工业应用和中功率板级转换）
三、优势与适用场景
- 高集成度：内置功率管，外部只需少量电感、电容和反馈电阻，简化系统设计。
- 中高效率：采用同步整流，轻载到中载效率表现良好，适合对能耗敏感的应用。
- 高频率：570kHz 开关频率在尺寸与效率间取得平衡，可使用体积较小的磁性件。
- 适用场景：工业控制、通信设备、车载电子（需遵循车规额外验证）、消费电子、嵌入式系统的主从供电或点对点电源。
四、设计建议与注意事项
- 外围器件选择：根据输出电流与纹波要求选择合适的电感（建议根据570kHz计算饱和电流和DCR），输入/输出电容选低ESR类型以降低纹波和稳定性问题。
- 反馈网络：输出电压通过外部分压电阻设置，注意反馈网络的阻抗与器件内部参考源匹配，必要时加入小并联补偿元件以保持环路稳定。
- 布局要点：靠近器件布置输入电容，缩短开关回路回流路径，尽量减小寄生电感；输出电流走线加宽，热流回流良好。
- 热管理：在高输入压差或高负载时关注芯片功耗，必要时采用散热铜箔或散热片以降低结温，保证长期可靠性。
- 保护机制：常见应用中建议配置过流、过温及软启动等保护措施，具体实现与器件内部保护策略请参照官方资料。
五、封装与热性能
SOP-8 封装便于标准化生產和焊接，封装散热能力受限于PCB铜面积与焊盘设计。建议在器件底部和周围增加散热铜箔，合理设计热过孔以提升热传导，必要时在PCB底层布置散热平面。
六、选型与技术支持
在工程开发前，建议获取并仔细阅读 TMI33431 的完整数据手册，核对引脚定义、动态特性、保护门限与推荐外围元件清单。若用于车规或关键任务场景，请联系厂商确认额外验证或可替代型号。厂商技术支持通常能提供参考设计、布局示意图及BOM，便于快速评估与量产移植。
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