WMSIC Electronic Components

LRC LR432ALT1G

ModelLR432ALT1G
PackageSOT-23
BrandLRC
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
LRC LR432ALT1G
Type
LRC
Minimum package
3000

Technical parameters

Electronic Component
LRC
Electronic Component
LR432ALT1G
Electronic Component
1
Package
SOT-23
Electronic Component
Voltage Reference IC
Electronic Component
±1%
Electronic Component
0.031g
Electronic Component
1
Electronic Component
BM0227210437
Operating Temperature
40℃~+105℃
Operating Voltage
1.24V~18V
Output Voltage
1.24V~18V
Output Current
100mA
Output Type
Electronic Component
Static Current(Iq)
250nA
Electronic Component
3000

For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.

LR432ALT1G 产品概述

一、产品简介

LR432ALT1G 是乐山无线电(LRC)推出的一款可调稳压元件,适用于需要精确、低功耗电压参考或小功率可调稳压的场合。它支持输出电压可调范围 1.24V 到 18V,最大输出电流 100mA,具有高精度(±1%)和极低静态电流(Iq = 250nA),工作温度范围宽(-40℃ ~ +105℃),适合便携式、低功耗及精密应用。

二、主要性能特点

  • 输出类型:可调输出,输出电压范围 1.24V ~ 18V,方便按外接分压器设定目标电压。
  • 输出电流:最大可提供 100mA,足以驱动小功率放大器、传感器或少量外设。
  • 精度:输出电压精度为 ±1%,适用于对参考电压或较高稳定性有要求的电路。
  • 极低静态电流:静态电流仅 250nA,适用于电池供电和超低功耗系统,有助于延长待机时间。
  • 最低调节电流:维持稳压所需的最小阴极电流(或调整回路电流)为 60 µA,使用时需保证该电流水平以维持稳定输出。
  • 工作温度范围:-40℃ ~ +105℃,可在广泛环境温度下可靠工作。

三、典型应用场景

  • 电池供电的便携式仪器:依赖低静态电流特性延长待机时间,同时提供稳定可调电源。
  • 精密测量与数据采集:作为 ADC/DAC 的参考电压源或传感器供电源,利用 ±1% 精度提高测量一致性。
  • 小功率可调稳压模块:用于驱动小功率放大器、模拟前端、低功耗 MCU 外设等。
  • 校准和基准电路:在需要可调精密参考电压以进行校准或实验验证时使用。
  • LED 驱动(限低电流):可驱动小电流指示灯或低功率 LED,但需注意功率与散热限制。

四、设计与使用要点

  • 最小调节电流要求:为了保证稳压正常工作,输出回路或分压电阻需保证至少 60 µA 的调节电流;若负载可能在无活动时降至更低电流,建议并联一个合适阻值的“保持负载”(bleeder)或确保分压器电流不低于该阈值。
  • 输入与输出电源裕量:资料中未给出具体压差(dropout)值,设计时应预留一定输入电压裕量以保证在最大负载和温差下仍能维持设定输出;建议参考厂方完整数据手册确认最小差压要求。
  • 旁路与稳定性:为保证瞬态响应与抗噪声能力,推荐在输入和输出端使用低 ESR 的去耦电容(如陶瓷电容)近端旁路;若用于高精度场合,可加入滤波电容和屏蔽布局。
  • 调节网络建议:使用精密电阻设定分压器可以发挥 ±1% 的输出精度,若需更高稳定性,可采用温漂小的金属膜电阻。
  • 启动与瞬态响应:极低的静态电流虽然有利于节能,但可能导致瞬态恢复较慢,设计时考虑负载突变的影响并适当配置输出滤波与补偿。

五、热设计与可靠性

  • 功率耗散:在稳压器中,芯片耗散功率约为 (Vin - Vout) × Iout;在接近 100mA 输出或较大电压差时,芯片温升会明显增加。由于封装和热阻资料未注明,务必按照实际应用场景估算并控制芯片结温,必要时采取散热或降低负载电流。
  • 温度范围:器件支持 -40℃ 到 +105℃ 的工作温度,适合工业级应用;在高温环境或长期工作情况下,关注热应力对精度和长期漂移的影响。
  • 长期可靠性:建议参考厂方寿命与加速老化试验数据,关键应用中预留安全裕度并进行验证测试。

六、封装与订购建议

  • 品牌信息:LRC(乐山无线电)。
  • 封装:当前资料中未提供封装形式(标注为 “-”),在设计和采购前请向供应商或厂方确认具体封装、引脚排列及包装规格。
  • 采购建议:对于批量应用,向厂商索取完整数据手册(含典型应用电路、引脚定义、热参数和测试条件)以及封装图,必要时申请样片进行实际电路验证。

七、注意事项与资料获取

  • 在实际设计前务必获取并研读厂方完整数据手册,确认 dropout、温漂、启动特性、最大节点电压、保护功能(如过流、短路保护)等未在此概述中列出的参数。
  • 由于某些关键参数(如封装、热阻和瞬态性能)未提供,建议在样机阶段进行功耗、热测与动态响应测试,确保满足系统可靠性要求。
  • 如需更详细的设计建议、参考电路或替代型号比较,可联系乐山无线电或其授权分销渠道获取技术支持。

若需我根据您的具体电路(输入电压范围、目标输出电压、负载特性)给出示例电阻计算、去耦电容选择或热耗估算,我可以继续提供更具体的设计指导。

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