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TMI TMI3344
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3344
- Type
- TMI
- Minimum package
- 3000 未知
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3344
- Electronic Component
- 1
- Package
- ESOP-8
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.18g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0258503958
- Operating Temperature
- 40℃~+150℃
- Operating Voltage
- 4.5V~30V
- Switching Frequency
- 340kHz
- 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.
TMI3344 产品概述
一、产品简介
TMI3344 是拓尔微（TMI）推出的一款高集成度降压型开关稳压器，采用降压拓扑、内置开关管并实现同步整流，单通道可调输出，输出电流可达 3A。工作电压范围宽（4.5V～30V），开关频率固定在 340kHz，静态电流仅 380μA，适合对效率、体积和散热有较高要求的工业与汽车类应用。
二、主要特性
- 宽输入电压：4.5V ～ 30V，兼容 12V、24V 系统及多数车用电源环境。
- 输出能力：最大连续输出电流 3A，支持中等功率负载。
- 同步整流：内部同步 MOSFET，减少整流损耗、提高系统效率。
- 开关频率：340kHz，在效率与外部元件体积之间取得平衡。
- 低静态电流：Iq = 380μA，有利于轻载或待机功耗控制。
- 宽工作温度：-40℃ ～ +150℃，适应苛刻环境。
- 封装：ESOP-8，便于焊接与热量传导。
三、电气规格与选型建议
- 输出类型：可调，用户通过外部电阻分压设定目标电压。
- 开关管：内置，简化外围电路，省去外部功率器件选型。
- 外部元器件：建议选择低 DCR、大电流容量的电感（额定电流 > 3A，饱和电流裕量）、低 ESR 的陶瓷或固态电容作输出滤波。根据 340kHz 频率，典型电感量可在数 μH 范围内以兼顾纹波与瞬态响应。
- 保护与容错：数据手册中若包含过流、过温、欠压锁定等保护特性，可进一步简化系统设计；如需更高可靠性，可配合外部保护电路。
四、典型应用
- 工业控制与仪器电源（24V/12V 母线降压）
- 汽车电子（符合宽电压输入与高温工作场景）
- 网络设备、通信基站辅助电源
- 工业 IoT、边缘计算模块电源
五、设计与 PCB 布局要点
- 高电流回路尽量短且宽：VIN、SW、GND 的回流路径应最短，使用厚铜与多过孔散流。
- 输入与输出电容靠近器件引脚放置，减少回路面积与电压尖峰。
- 将反馈网络远离开关节点和噪声源，保证反馈采样精度。
- 若出现 EMI 或振铃，可在开关节点增加 RC 阻尼或选用吸收元件。
- 热设计：ESOP-8 需在 PCB 下方留焊盘并用多层铜通 via 导热至大面积地平面以利散热。
六、封装与热管理
ESOP-8 封装便于散热与自动化组装，但在高负载或高环境温度下仍需注意功耗分散。评估功率损耗（导通损耗 + 开关损耗）并在 PCB 设计中预留足够散热面积，必要时增加散热片或热 vias。
总结：TMI3344 以其宽输入、电流能力、同步整流与低静态电流特性，适合在体积受限且需高可靠性的场合作为主电源或局部降压电源。具体参数与应用细节建议参照官方数据手册进行最终设计验证。
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