WMSIC Electronic Components

UMW LM317DCYR

ModelLM317DCYR
PackageSOT-223
BrandUMW
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 Electronic Component

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
UMW LM317DCYR
Type
UMW
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
UMW
Electronic Component
LM317DCYR
Electronic Component
1
Package
SOT-223
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.23g
Electronic Component
1
Electronic Component
BM0264465137
Operating Temperature
0℃~+125℃@(Tj)
Operating Voltage
40V
Output
Electronic Component
Output Voltage
1.2V~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.

LM317DCYR 可调线性稳压器 产品概述

一、产品简介

LM317DCYR 是友台半导体(UMW)推出的一款高压可调线性稳压器,采用SOT-223封装,面向对噪声、稳压精度和保护性能有较高要求的通用电子电源设计。器件支持正极输出,输出电压可在1.2V至37V范围内连续调节,最大输出电流可达1.5A,适用于中低功率的开关电源后端滤波、模拟电源与工业控制电源等场景。

二、主要性能参数

  • 输出类型:可调(正极输出)
  • 输出电压范围:1.2V ~ 37V
  • 最大工作电压:40V(输入端承受电压)
  • 输出电流:最大1.5A
  • 静态电流(Iq):典型值12mA
  • 电源纹波抑制比(PSRR):66dB @ 120Hz
  • 保护特性:过流保护、过热保护
  • 工作温度(结温):0℃ ~ +125℃(Tj)
  • 输出通道数:单路
  • 封装:SOT-223
    这些参数表明该器件在高输入压差、大动态负载下仍能维持良好的稳压性能,并具备可靠的自保护能力。

三、典型特性与优势

  1. 宽输出调节范围:1.2V ~ 37V 的可调范围满足多类电路对不同电压轨的需求,减少外部器件种类。
  2. 良好的纹波抑制:在工频/整流后频率(120Hz)处66dB的PSRR,有利于降低交流整流残留纹波对敏感模拟电路的影响。
  3. 可靠保护机制:集成过流和过温保护,提升系统可靠性并简化外围保护设计。
  4. 低封装阻抗:SOT-223封装利于散热,配合合理的PCB散热铺铜可支持较大输出电流。
  5. 低静态电流:12mA的静态电流在同类器件中属于合理水平,适合多数不要求超低功耗的应用。

四、应用建议与注意事项

  • 稳定性:为保证调节环路稳定并获得最佳噪声性能,建议在输入端和输出端按设计规范配置适当的旁路电容与输出滤波电容(电容类型与ESR需按应用验证)。
  • 散热管理:在持续大电流或输入-输出压差较大时,器件会产生较多热量,需在SOT-223引脚区域做足铺铜或外接散热片,并评估结温是否在允许范围内。
  • 调节电阻网络:采用高精度调节电阻可提升输出电压精度,同时注意调整网络可能引入的噪声与偏置电流影响。
  • 保护配合:尽管内部具备过流/过温保护,仍建议在系统层面加入必要的熔断或限流设计以应对异常故障。

五、典型应用领域

  • 工业控制与仪表电源
  • 模拟与放大电路的局部稳压电源
  • 通信设备和外围接口电源
  • 实验室电源模块与可调电源设计

LM317DCYR 以其宽电压调节范围、良好抑纹能力和完善的保护功能,适合在多种中低功率电源设计中作为可靠的线性稳压解决方案。购买与设计时请参考厂商完整数据手册以获得详细的电气特性曲线与推荐外围网络。

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