WMSIC Electronic Components

TMI TMI3255S

ModelTMI3255S
PackageSOT-23-6
BrandTMI
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
TMI TMI3255S
Type
TMI
Minimum package
3000 未知

Technical parameters

Electronic Component
Electronic Component
Electronic Component
TMI
Electronic Component
TMI3255S
Electronic Component
1
Package
SOT-23-6
Electronic Component
DC-DC Power Supply IC
Electronic Component
0.099g
Electronic Component
1
Type
Electronic Component
Synchronous
Electronic Component
Electronic Component
BM0230631099
Operating Temperature
40℃~+125℃@(TJ)
Operating Voltage
4.5V~18V
Switching Frequency
450kHz~800kHz
Electronic Component
Electronic Component
Output Current
5A

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

TMI3255S 产品概述

TMI3255S 是拓尔微(TMI)推出的一款降压型(buck)DC-DC开关稳压器,适用于中高效率、空间受限的电源解决方案。器件集成开关管,支持可调输出,输入电压范围宽(4.5V~18V),峰值持续输出电流可达5A,工作温度范围覆盖-40℃至+125℃(TJ),非常适合工业与消费类应用中的稳压需求。

一、主要特性

  • 功能类型:降压型(可调输出)
  • 输入电压:4.5V ~ 18V
  • 最大输出电流:5A
  • 开关频率:450kHz ~ 800kHz(典型工作范围)
  • 静态电流(Iq):340μA(待机低功耗)
  • 开关管:内置功率开关管
  • 拓扑结构:降压式
  • 工作结温:-40℃ ~ +125℃(TJ)
  • 封装:SOT-23-6

二、性能亮点

  • 宽输入电压兼容多种电源源(如电池组、适配器或车载电源)
  • 低静态电流利于低功耗待机应用
  • 内置开关管减少外部元件数量与PCB面积
  • 可调输出便于灵活设置目标电压,适配不同负载需求
  • 中高开关频率有助于缩小外置电感和电容尺寸

三、典型应用场景

  • 工业控制与仪表供电
  • 通信设备与网络产品
  • 便携式消费电子与智能终端
  • 点烟器/车载电子(在输入电压允许范围内)
  • 电源模块与分布式电源设计

四、封装与热管理

  • 标准SOT-23-6小封装,适合密集布局
  • 由于器件可承载5A输出电流,应在PCB上做好热散设计:靠近器件布置大面积铜箔、必要时采用热铜墩与过孔导热至背面散热层
  • 在高功率工作或高环境温度时,注意降低器件结温,保证长期可靠性

五、设计与注意事项

  • 输出电感:选型需满足5A连续电流,考虑直流电阻与磁饱和特性
  • 输出电容:优选低ESR电解或固态电容以降低纹波与稳定环路
  • 输入电容:靠近VIN与GND端的陶瓷电容以抑制开关尖峰
  • 反馈网络:通过外部分压电阻设置所需输出,布线应短且远离噪声源
  • 若器件为非同步降压(请参阅完整数据手册确认),需配置合适的续流二极管;若为同步结构,则可省去外部整流二极管
  • 布局要点:输入回路、开关节点与功率地应最短最粗;敏感的反馈和参考地应独立回到可靠的参考地点

六、结论

TMI3255S 在SOT-23-6小封装下提供高达5A的降压能力,兼具宽输入、电源效率与低静态电流特点,适合对体积、效率和成本有综合要求的电源设计。为获得最佳性能,请根据实际应用仔细选择电感与电容,并按数据手册建议优化PCB布局与热管理。

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