WMSIC Electronic Components

XBLW LM317MGDTR

ModelLM317MGDTR(XBLW)
PackageTO-252
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
XBLW LM317MGDTR(XBLW)
Type
XBLW
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
XBLW
Electronic Component
LM317MGDTR(XBLW)
Electronic Component
1
Package
TO-252
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.391g
Electronic Component
1
Electronic Component
BM0265621905
Operating Temperature
20℃~+125℃@(Ta)
Operating Voltage
40V
Output
Electronic Component
Output Voltage
1.2V~37V
Output Current
500mA
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.

LM317MGDTR(芯伯乐XBLW)线性稳压器产品概述

一、产品基本定位与核心身份

LM317MGDTR是芯伯乐(XBLW)品牌推出的可调式线性稳压器,属于经典LM317系列的衍生型号,采用TO-252-2贴片封装,专为中小功率、宽电压范围的稳压需求设计。作为单通道正极输出器件,其核心功能是将输入电压稳定转换为可调节的输出电压,同时内置多重保护机制,适配宽温度范围的应用场景,可替代传统固定电压稳压器,降低系统设计复杂度。

二、关键电气性能参数解析

该器件的核心参数直接决定了应用边界,具体关键参数及意义如下:

  1. 电压范围:输入工作电压最高支持40V,输出电压可在1.2V~37V之间连续可调——覆盖从低压逻辑电平(如1.2V适配低功耗MCU)到中压电源(如37V适配部分功率器件)的广泛需求,无需更换不同规格稳压器即可满足多场景电压调节。
  2. 输出电流:额定输出电流为500mA,可稳定驱动中小功率负载(如传感器、小型单片机、LED驱动等),无需额外功率扩展电路,适合多数便携式/嵌入式设备的电源需求。
  3. 纹波抑制能力:在120Hz典型工频下,电源纹波抑制比(PSRR)达75dB——能有效抑制输入电源中的工频纹波(如市电整流后的纹波),输出电压纯净度较高,适合对纹波敏感的电路(如模拟信号处理、精密仪表)。
  4. 输出特性:单通道正极输出,结构简单,无需复杂的负电源设计,减少系统布线难度。

三、防护与可靠性设计

为提升实际应用中的稳定性,LM317MGDTR内置多重保护机制,并支持宽温度范围工作:

  1. 过热保护:当器件结温超过阈值时自动关断输出,避免因过载、散热不良导致的烧毁,延长使用寿命,尤其适合长时间连续工作的场景。
  2. 短路保护:输出端发生短路时,内部限流电路启动,限制输出电流在安全范围内,防止短路故障扩散至其他电路,提升系统抗故障能力。
  3. 宽温工作范围:支持-20℃+125℃(环境温度Ta)——覆盖工业级(-40℃+85℃)和部分车载级(-40℃~+125℃)的温度需求,可应用于户外设备、工业控制柜、车载辅助电路等恶劣环境。

四、封装形式与应用场景

  1. 封装特点:采用TO-252-2贴片封装(又称DPAK),体积小巧(约6.5mm×5.0mm×2.3mm),引脚间距合理,便于PCB自动化贴装;同时具备良好的散热性能,适合高密度电路设计,减少系统占用空间。
  2. 典型应用场景:
    • 工业控制:PLC模块、传感器节点的稳压电源;
    • 消费电子:智能家居设备、小型家电的辅助电源;
    • 汽车电子:车载显示屏、传感器的低压稳压(结合宽温特性);
    • 仪器仪表:示波器、万用表的精密基准电源(依赖高PSRR)。

五、典型应用电路说明

LM317MGDTR的可调稳压电路仅需两个外接电阻即可实现电压调节,核心公式为:
[ V_{out} = 1.25V \times \left(1 + \frac{R_2}{R_1}\right) ]
其中:

  • ( R_1 ) 建议取240Ω(典型值),保证最小输出电流(约5mA);
  • ( R_2 ) 采用可变电阻(如电位器)或固定电阻,调节其阻值可得到1.2V~37V的输出电压(当( R_2=0 )时,( V_{out}=1.25V );当( R_2≈6.8kΩ )时,( V_{out}≈37V ))。

该电路无需额外复杂元件,设计简单、调试方便,适合快速原型开发与量产。

总结

LM317MGDTR(XBLW)作为一款高性价比可调线性稳压器,凭借宽电压范围、可靠的防护机制、宽温特性及紧凑封装,可广泛应用于工业、消费、汽车等领域的中小功率稳压需求,是替代传统固定电压稳压器的理想选择,能有效降低系统设计成本与复杂度。

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