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XBLW LM337S
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- XBLW LM337S(XBLW)
- Type
- XBLW
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- XBLW
- Electronic Component
- LM337S(XBLW)
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.24g
- Electronic Component
- 1
- Electronic Component
- BM0265609041
- Operating Temperature
- 0℃~+125℃
- Operating Voltage
- 40V
- Output
- Electronic Component
- Output Voltage
- 1.25V~37V
- Output Current
- 1.5A
- Output Type
- Electronic Component
- Output Channel Count
- 1
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM337S(XBLW) 可调负输出线性稳压器产品概述
LM337S(XBLW)是芯伯乐（XBLW）推出的工业级可调负输出线性稳压器，专为需要稳定负电压供电的电子系统设计，兼容传统LM337系列引脚定义，具备高可靠性、宽温度范围及全面保护功能，可广泛应用于工业控制、通信、测试仪器等场景。
一、产品核心定位与价值
该器件针对中等功率负电压需求优化，解决了传统负输出稳压器在工业环境下温度适应性差、纹波抑制不足等问题。作为国产化替代方案，LM337S(XBLW)在保持与进口器件引脚兼容的同时，提升了电源纹波抑制比（PSRR）及热可靠性，降低了系统设计成本与维护难度。
二、关键性能参数详解
参数项 规格值 应用意义 输出类型 连续可调 无需更换电阻即可灵活设置负电压输出值 输出电压范围 1.25V ~ 37V（负极性） 覆盖常见负偏置电压（如±5V、±12V、±24V等） 最大输出电流 1.5A 满足多数工业模块、通信设备的功率需求 电源纹波抑制比（PSRR） 77dB @ 120Hz 有效抑制电网/开关电源的低频纹波干扰 工作电压范围 最大40V（输入） 适配12V、24V、36V等常用工业电源输入 工作温度范围 0℃ ~ +125℃（工业级） 适应高温、低温的复杂工业环境 输出通道数 单通道 简化电路设计，降低布局复杂度三、封装与物理特性
LM337S(XBLW)采用SOT-223贴片封装，具有以下优势：
- 体积紧凑：尺寸约6.5×3.5×1.6mm，适合小型化设备（如手持仪器、模块电源）；
- 散热优化：封装自带大面积散热焊盘，可通过PCB铜箔或小型散热片进一步提升散热能力；
- 引脚兼容：与标准LM337S引脚定义一致（1脚：调整端ADJ；2脚：输出端OUT；3脚：输入端IN），无需修改硬件即可替换进口器件。
四、全面保护功能提升可靠性
该器件内置三重保护机制，确保系统在异常工况下安全运行：
- 过流保护（OCP）：当输出电流超过1.5A阈值时，自动限制电流至1.2~1.8A（典型值），避免器件过载烧毁；
- 短路保护（SCP）：输出端与地/输入端短路时，立即关断输出，故障排除后自动恢复；
- 热关断（TSD）：结温超过150℃（典型值）时触发关断，温度降至120℃左右自动重启，防止过热损坏。
五、典型应用场景
LM337S(XBLW)适用于以下场景：
- 工业控制：PLC模块、传感器偏置电源（如±12V、±24V双电源）；
- 通信设备：基站射频单元、路由器辅助电源；
- 测试仪器：示波器、信号发生器的负电压通道；
- 便携式设备：小型医疗监护仪、手持工业检测仪；
- 电源模块：与LM317正输出稳压器配合，实现紧凑式正负双电源设计。
六、设计注意事项
为确保稳定工作，需注意以下细节：
- 压差要求：输入电压需比输出电压高3V以上（如输出-12V时，输入需≥-15V）；
- 滤波电容：输入端接100nF陶瓷电容，调整端与输出端接10μF电解电容，抑制纹波与噪声；
- 散热设计：1.5A输出时建议在PCB散热焊盘处增加铜箔面积，或贴装小型散热片；
- 输出电压计算：通过调整端与地之间的电阻（R1）、输出与调整端之间的电阻（R2），由公式Vout = -1.25V×(1+R2/R1)计算目标电压。
总结
LM337S(XBLW)作为芯伯乐推出的工业级可调负输出稳压器，兼具高性能、高可靠性、紧凑封装等优势，完美适配工业环境的负电压供电需求，是替代进口LM337S的理想国产化方案。
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