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ETA ETA2821S2G
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- ETA ETA2821S2G
- Type
- ETA
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- ETA
- Electronic Component
- ETA2821S2G
- Electronic Component
- 1
- Package
- SOT23-6
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 0.055g
- Electronic Component
- 1
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0257283490
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 4V~38V
- Switching Frequency
- 650kHz
- Electronic Component
- Electronic Component
- Output Current
- 1.5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
ETA2821S2G 产品概述
一、产品简介
ETA2821S2G 是钰泰（ETA）推出的一款降压型开关稳压器，采用降压拓扑并内置开关管，工作电压范围宽（4V38V），输出电流可达1.5A，开关频率650kHz，工作温度范围-40℃+85℃，输出为可调式，封装为SOT23-6。器件为非同步整流结构（需要外置肖特基二极管作为整流元件），适合对成本、尺寸有要求的中低功率电源设计。
二、主要规格特性
- 输入电压范围：4V ~ 38V
- 最大输出电流：1.5A（受封装散热和环境温度影响）
- 开关频率：650kHz（较高频率有利于缩小磁性元件体积）
- 同步整流：否（需外接低压降肖特基二极管）
- 输出通道：单通道，可通过外部分压电阻调节输出电压
- 封装：SOT23-6，利于小尺寸应用
- 工作温度：-40℃ ~ +85℃
三、典型应用场景
- 汽车电子（需考虑抑制瞬态和热设计）
- 通信设备、小型工业控制模块
- 消费类便携设备的主、次电源降压
- 需要从较高母线电压降压至低压点的场合
四、设计要点与使用建议
- 由于为非同步结构，需选择低正向压降的肖特基二极管以提升效率，尤其在高负载时影响明显。
- 开关频率较高，可选用体积较小的电感（经验值范围通常在几µH到十几µH），但需保证电流不过饱和。
- 输入/输出电容建议使用低ESR的陶瓷电容，以减小纹波与提高瞬态响应；适当并联电解/钽电容以改善稳定性。
- 布局要点：开关节点走线尽量短且成簇布置，输入电容靠近芯片电源端，肖特基二极管与电感紧密连接，反馈回路保持短且远离开关噪声源。
五、热管理与可靠性
SOT23-6 封装散热受限，高电流运行时需关注结温。在高输入压差或连续满载工况下，建议增加铜箔散热、减小热阻或考虑外置散热方案，以避免因过热进入热关断或降低寿命。
六、常见注意事项
- 设计时应验证在最坏工况（最高输入电压、最大负载、最高环境温度）下的输出与温升表现。
- 对精密应用注意输出纹波与效率损耗（非同步结构在中高负载下效率低于同步方案）。
- 调节输出时按器件建议的反馈网络范围选择电阻阻值，避免影响稳定性。
如需典型电路图、参考元件选型或散热计算示例，可提供工作条件，协助给出更具体的设计建议。
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