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TMI TMI3253S
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3253S
- Type
- TMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3253S
- Electronic Component
- 1
- Package
- SOT-23-6
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.019g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0226163139
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 4.5V~18V
- Switching Frequency
- 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.
TMI3253S 产品概述
一、产品简介
TMI3253S 是拓尔微（TMI）推出的一款高集成、高效率降压型开关稳压器。器件采用降压（Buck）拓扑，内置功率开关，支持同步整流，输出为可调类型，单通道设计，适合对体积、效率和成本有较高要求的便携与嵌入式电源应用。
二、主要特性
- 输入电压范围：4.5V ~ 18V
- 输出电流：最大 3A
- 开关频率：600kHz（典型）
- 同步整流：内置，提高转换效率并降低外部整流损耗
- 静态电流（Iq）：300µA，待机功耗低
- 工作结温：-40℃ ~ +125℃（TJ）
- 封装：SOT-23-6，外形小巧，便于空间受限设计
- 输出类型：可调，方便设定所需输出电压
三、功能与工作原理
TMI3253S 工作于固定开关频率的降压控制模式，通过片内高侧/低侧功率管交替导通，将较高输入电压转换为所需较低输出电压。同步整流配置用以替代传统肖特基二极管，显著降低导通损耗，提升中高负载下的效率。器件具备欠压、过流与热关断等保护功能（请参阅详细数据手册获取完整保护参数与门限）。
四、典型应用
- 车载与工业电源模块（满足宽输入电压至18V）
- 工业控制与仪表的点式供电
- 便携式设备与通信终端的主/从降压电源
- 摄像头、传感器供电与嵌入式系统电源管理
五、设计与布局建议
- 输入/输出电容采用低 ESR 电容，靠近 VIN、VOUT 与 GND 引脚布局，以降低纹波并保证环路稳定。
- 选用能承受 3A 连续电流的电感，低 DCR 有助于降低损耗与发热；根据输出电压/电流选择合适电感值以满足峰值电流与纹波要求。
- 开关节点（SW）走线尽量短且宽，减小寄生电感。功率回路（VIN、SW、VOUT、GND）应形成最小回路面积。
- SOT-23-6 封装散热能力有限，建议在 PCB 下方增加铜箔与热过孔以改善散热，避免长期在高温或近 TJ 上限下工作。
- 对于高精度或低噪声场合，可增加输入滤波与输出后级滤波电路并优化布局屏蔽。
六、封装与注意事项
TMI3253S 提供 SOT-23-6 小型封装，适合空间受限设计。设计时需关注器件热行为与环境温度（-40℃至+125℃ TJ），并按应用场景设置合适的热裕度。更多电气特性、典型效率曲线与推荐外围元件值，请参考官方数据手册或联系拓尔微技术支持获取样片与参考设计。
如需典型应用电路、PCB 布局示意或参考 BOM，我可以基于目标输入/输出电压与负载提供具体建议。
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