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JSMSEMI LM2576S-5.0 LM2576S
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- JSMSEMI LM2576S-5.0
- Type
- JSMSEMI
- Minimum package
- 500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- JSMSEMI
- Electronic Component
- LM2576S-5.0
- Electronic Component
- 1
- Package
- TO-263-5
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 1.668g
- Electronic Component
- 1
- Features
- Electronic Component
- Type
- Electronic Component
- Electronic Component
- BM0257674415
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 4.5V~40V
- Switching Frequency
- 52kHz
- Electronic Component
- Electronic Component
- Output Voltage
- 5V
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM2576S-5.0 产品概述
一、基本特性
LM2576S-5.0 为降压型开关稳压器，JSMSEMI（杰盛微）品牌，输出为固定 5.0V，最大输出电流 3A。工作电压范围宽，输入可在 4.5V 至 40V 之间稳定工作；内部集成开关管，采用降压式拓扑，开关频率约 52kHz。器件适用工作温度范围为 -40℃ 到 +125℃，封装为 TO-263-5，便于通过铜箔和散热孔改善散热性能。
二、核心优势
- 内置开关管，外围元件少，简化电源设计与BOM成本。
- 宽输入电压范围，适合多种电池、电源母线或车载供电系统。
- 3A 持续输出能力，符合中等功率模块化电源需求。
- 52kHz 开关频率在射频干扰和器件尺寸之间取得平衡，有利于较小电感与滤波器设计。
三、典型应用场景
- 工业控制与自动化设备的 5V 供电。
- 嵌入式系统、单板计算机及外设电源。
- 汽车电子低压域（需满足车规滤波与浪涌保护）。
- 便携式仪器、通信设备及电池供电系统的稳压模块。
四、设计与使用注意事项
- 输入电压应严格保持在 4.5V~40V 内，避免长时间接近极限值以延长寿命。
- 输出 3A 为器件能承受的最大持续电流，实际应用需考虑散热与效率，必要时设计散热片或大铜面积散热。
- 推荐选用低 ESR 的输入/输出电容以及满足电流和耐压要求的肖特基二极管（若参考设计要求），以保证稳定性与效率。
- 布局时应尽量缩短信号回路面积，输入电容靠近器件 VIN 和地引脚，开关节点走线尽量短并加驻波抑制措施以减少 EMI。
五、封装与热管理
TO-263-5（D2PAK/类似封装）便于通过 PCB 大面积铜箔和散热孔进行导热。高功率工况下器件自身会产生显著热量，建议配合散热铜箔、过孔或外加散热片，并确保结温低于 +125℃。在高 Vin 与大电流条件下，应评估稳压器功耗与效率并做热仿真。
六、可靠性与环境适应性
器件工作温度覆盖 -40℃~+125℃，可满足大多数工业级环境要求。为保证长期可靠性，应考虑输入电压尖峰抑制、浪涌保护和合适的 EMI 滤波设计，尤其在汽车或工业现场有较强干扰的场景。
七、总结
LM2576S-5.0 以其内置开关、宽输入范围和 3A 输出能力，适合用作 5V 中等功率降压解决方案。合理的外围元件选择与良好 PCB 热设计是发挥其性能并保证可靠性的关键。在满足器件规范前提下，可在多类工业、通信与嵌入式应用中实现稳定、简洁的电源设计。
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