WMSIC Electronic Components

XBLW LM337MDTR

ModelLM337MDTR(XBLW)
PackageTO-252-2L
BrandXBLW
Price Price on request Electronic component prices change quickly with market supply and demand. Please refer to the latest WMSIC quotation for current pricing.
Configuration
1 options
Configuration 26+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
XBLW LM337MDTR(XBLW)
Type
TO-252-2L
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
XBLW
Electronic Component
0.003%Vout
Electronic Component
LM337MDTR(XBLW)
Electronic Component
1
Package
TO-252-2L
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.445g
Electronic Component
1
Electronic Component
BM0265621923
Operating Temperature
0℃~+125℃@(Tj)
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.

LM337MDTR(芯伯乐XBLW)可调负电压线性稳压器产品概述

一、产品核心定位

LM337MDTR是芯伯乐(XBLW)推出的工业级可调负电压线性稳压器,属于经典LM337系列的贴片衍生型号,主打「宽电压覆盖、高纹波抑制、可靠防护」三大核心优势,适配工业控制、汽车电子、音频设备等对负电源有需求的场景,尤其适合小型化、高稳定度设计。

二、关键性能参数详解

该器件的参数直接决定应用边界,核心指标如下:

  1. 输出特性:输出电压范围1.25V~37V(可调),支持单通道负极输出;最大输出电流1.5A,可覆盖中小功率负载(如传感器模块、音频放大器);
  2. 纹波与噪声:电源纹波抑制比(PSRR)77dB@120Hz(开关电源纹波典型频率),即输入纹波衰减约2200倍;输出噪声0.003%Vout(峰峰值),是同类型器件低噪声水平,适配音频、医疗等敏感电路;
  3. 温度范围:结温(Tj)支持0℃~+125℃,符合工业级标准,可适应高温环境(如汽车发动机舱、工业控制柜)。

三、核心特性与保护机制

内置多重防护提升系统可靠性:

  1. 过流保护(OCP):典型触发阈值约1.8A(高于额定1.5A),负载过载时自动限流,避免短路损坏;
  2. 热关断(TSD):结温达150℃左右触发,完全切断输出,防止器件烧毁;
  3. 过热保护(OTP):结温接近150℃时逐步降流,避免突然关断干扰负载(如数据丢失)。

四、封装与应用适配性

  1. 封装形式:采用TO-252-2L(DPAK)贴片封装,引脚定义为:①输出端(Vout)、②调整端(Adj)、③输入端(Vin),占板面积仅6.5mm×5.0mm,适合高密度PCB;
  2. 散热设计:自带散热焊盘,1.5A负载下搭配10mm×10mm×2mm铝片即可满足工业温区散热;
  3. 压差要求:典型输入输出压差1.5V(Vin ≥ Vout + 1.5V),需确保输入电压充足,避免输出不稳。

五、典型应用场景

该器件适配以下场景:

  1. 工业控制:PLC模块、传感器接口的-5V/-12V负偏置电源;
  2. 音频设备:耳机放大器、调音台的低噪声负电源(适配音频信号放大);
  3. 汽车电子:车载音响、胎压监测的辅助负电源(宽温适配车载环境);
  4. 通信设备:基站收发信机的偏置电源(纹波抑制适配射频电路);
  5. 医疗设备:监护仪、心电图机的精密负电源(低噪声适配模拟信号采集)。

六、设计注意事项

  1. 电容选型:输入并联10μF钽电容,输出并联10μF钽电容,调整端并联10μF电容(抑制噪声);
  2. 电压调节:通过调整端与输出端的R1、调整端与地的R2调节,公式:Vout = -1.25V × (1 + R2/R1);
  3. 最小负载:需≥5mA,若负载不足,并联1kΩ假负载确保稳定。

总结

LM337MDTR以宽电压、低噪声、高可靠为核心,搭配小型化贴片封装与工业级温度范围,是替代传统负电源模块的高性价比选择。其三重保护机制与纹波抑制能力,可有效降低系统维护成本,适配各类对稳定性要求较高的场景。

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