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ETA(钰泰) ETA3499S2G
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ETA ETA3499S2G
- Type
- ETA
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ETA
- Electronic Component
- ETA3499S2G
- Electronic Component
- 1
- Package
- SOT-23-6L
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.048g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0233668285
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 2.4V~7.3V
- Switching Frequency
- 1MHz
- Electronic Component
- Electronic Component
- Output Voltage
- 600mV~7.3V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ETA3499S2G 产品概述
一、产品简介
ETA3499S2G 是钰泰（ETA）推出的一款高集成度降压型开关稳压器，采用同步整流降压拓扑，内置功率开关，单通道可调输出设计。工作电压范围为 2.4V 至 7.3V，开关频率 1MHz，持续输出电流可达 3A，工作温度范围 -40℃ 至 +85℃，封装为 SOT-23-6L，适合对体积、效率和成本有综合要求的便携和嵌入式系统。
二、主要规格与特性
- 功能类型：降压（Buck），同步整流。
- 输入电压 Vin：2.4V ~ 7.3V，支持常见单节锂电池及 5V/3.3V 输入源。
- 输出电流：最大 3A（需考虑散热与布局）。
- 开关频率：1MHz，利于使用小体积电感和电容，降低方案体积。
- 输出类型：外部电阻可调输出电压，支持点对点精确设定。
- 开关管：内置高效功率 MOSFET，简化外部器件选型。
- 工作温度：-40℃ ~ +85℃，适应工业级应用场景。
- 封装：SOT-23-6L，小型化封装利于空间受限 PCB 设计。
三、典型应用
- 移动电源、便携式设备（掌上设备、穿戴终端）。
- 工业控制与传感器供电模块。
- 通讯设备、路由器与边缘计算节点的局部稳压。
- 单节锂电池供电系统的高效降压管理。
四、设计与布局建议
- 推荐典型外围件：1µH ~ 2.2µH 低 DCR 高频电感、低 ESR 陶瓷输入/输出电容（X7R/X5R），反馈电阻按目标输出电压计算。1MHz 工作频率允许使用小体积电感，但应注意电感饱和电流需大于峰值电流。
- 布局要点：SW、L、Cout 区域走短且粗的铜迹，Cin 近 Vin 引脚放置；GND 采用完整地平面并保证电源回路最短；FB 引脚尽量远离噪声源，走线短且靠近滤波电容接地点。
- 热管理：SOT-23-6L 封装散热有限，高电流或高温环境下需注意顶层/底层铜迹散热，必要时加大散热铜箔或过孔。
五、性能与注意事项
- 同步整流在轻载与中重载时均可提供较高效率，但在轻载极低电流时需关注静态功耗与工作模式（如有循环模式或强制 PWM 的不同效率表现）。
- 1MHz 高频有利于元件小型化，但会带来较高的电磁干扰（EMI），需通过布局、滤波与屏蔽优化。
- 输出电流接近 3A 时，需保证输入源能力、器件封装散热以及电感、电容的额定电流与温升余量。
六、选型与采购建议
在选型时，确认系统输入电压范围、最大输出电流、允许的功耗/散热空间以及输出精度要求。若空间受限并且需较高效率，ETA3499S2G 在 1MHz 设计与同步整流上具有明显优势。采购时关注器件批次与版本，配套查看官方数据手册以获取详细管脚说明、典型应用电路和完整电气特性，以确保在目标应用中达到预期性能。
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