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TMI TMI3252
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- TMI TMI3252
- Type
- TMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- TMI
- Electronic Component
- TMI3252
- Electronic Component
- 1
- Package
- SOT-23-6
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.023g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0230608234
- Operating Temperature
- 40℃~+125℃@(TJ)
- Operating Voltage
- 4.5V~18V
- Switching Frequency
- 600kHz
- Electronic Component
- Electronic Component
- Output Current
- 2A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
TMI3252 降压型 DC-DC 电源芯片 概述
一、产品概述
TMI3252 是拓尔微（TMI）推出的一款高集成降压型开关稳压器，封装为 SOT-23-6。器件工作电压范围宽（4.5V 到 18V），集成同步整流和开关管，单输出可调，最大可持续输出电流 2A，开关频率 600kHz，静态电流仅 300μA，适用于对效率、尺寸和成本有较高要求的便携与工业电源设计。工作结温范围 -40℃ 到 +125℃（TJ）。
二、主要特性
- 输入电压范围：4.5V ～ 18V，适用于 12V、24V 等输入场景降压。
- 输出能力：最大输出电流 2A，单通道可调输出。
- 拓扑结构：降压（Buck），内部集成高侧/低侧开关（同步整流）。
- 开关频率：600kHz，利于减小外围磁性元件尺寸。
- 低静态电流：Iq ≈ 300μA，待机效率好。
- 封装：SOT-23-6，体积小，便于紧凑 PCB 布局。
- 工作温度：-40℃ ～ +125℃（结温 TJ）。
三、典型应用
- 工业控制与传感器供电（12V/24V 降压到 5V/3.3V）
- 电信与网络设备的辅助电源
- 车载电子（需确认输入浪涌与抖动容限并参照车规要求）
- 便携式仪器与消费类电子的本地稳压电源
四、外围元件与选型建议
- 电感：选择额定电流 ≥ 2A、低 DCR 的功率电感；典型值范围 1μH ～ 10μH（具体按占空比与电流磁通波形计算）。
- 输入电容：建议使用低 ESR 陶瓷电容（X5R/X7R）组合，典型 22μF ～ 100μF，靠近 VIN 与 GND 放置以抑制瞬态。
- 输出电容：低 ESR 陶瓷，典型 22μF ～ 100μF，根据负载纹波与瞬态要求调整。
- PCB 阻容与分流：反馈分压网络选择高稳定电阻，避免过长走线引入误差。
- 保护功能：器件通常会具备电流限制、热关断等保护，建议在设计前检查数据手册以确认具体保护特性与门限参数。
五、PCB 布局与散热建议
- 将输入电容、开关节点和输出电容尽量靠近芯片放置，缩短高电流回路环路。
- 建议采用大面积地平面并配合过孔（thermal vias）将热量导出至多层板或铜箔，提升热散能力。
- 将敏感引脚（FB、EN）走短且避开噪声源，避免开关干扰造成输出误差或不稳定。
- SW 节点应尽量避开模拟地和反馈走线，集中并短路处理。
六、使用注意与资料获取
在量产或关键设计前，请务必下载并参阅 TMI3252 的最新数据手册，确认内部参考电压、反馈公式、启动/关闭时序、保护限值、典型应用电路与布局参考。器件在车载或高温环境使用时，还需考虑输入瞬态保护与额外滤波。若需样片或评估板，可联系拓尔微或代理商获取参考设计与技术支持。
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