WMSIC Electronic Components

HGSEMI LM385M3-2.5/TR LM385M3

ModelLM385M3-2.5/TR
PackageSOT-23
BrandHGSEMI
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
HGSEMI LM385M3-2.5 / TR
Type
HGSEMI
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM385M3-2.5/TR
Electronic Component
1
Package
SOT-23
Electronic Component
Voltage Reference IC
Electronic Component
±1.5%
Electronic Component
0.032g
Electronic Component
1
Electronic Component
BM0226614589
Operating Temperature
0℃~+70℃
Electronic Component
80ppm/℃
Output Voltage
2.5V
Output Current
20mA
Output Type
Electronic Component
Static Current(Iq)
13uA

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

LM385M3-2.5/TR 产品概述

一、主要参数

  • 输出电压:2.5V
  • 输出电流(最大):20mA
  • 初始精度:±1.5%
  • 温度系数(TC):80ppm/℃
  • 静态电流(Iq):13μA
  • 最小阴极电流以进入稳压区:13μA
  • 噪声(10Hz–10kHz):120μVrms
  • 工作温度范围:0℃ 至 +70℃
  • 品牌:HGSEMI(华冠)
  • 封装:SOT‑23(带卷带包装 /TR)

二、产品特点

LM385M3-2.5/TR 是一款基于带隙结构的低功耗 2.5V 基准/基准稳压器,设计用于在小尺寸封装中提供稳定、低噪声的参考电压。其主要特点包括低静态电流、较小的温度漂移和较低的噪声,为电池供电及精密模拟电路提供性价比较高的参考源。

三、工作原理与使用方式

该器件作为一个“分流型”基准(shunt reference)工作:在被稳压点(阴极)与地之间形成稳定的 2.5V 电压。通常在供电总线上串联一个限流电阻,向阴极提供工作电流;当阴极电流在器件规定的工作区间(≥13μA)时即可进入稳压状态。输出可为片内电路或外部 ADC、DAC、比较器等提供参考电压;在需要较大负载驱动时,可根据最大输出电流 20mA 来配置供电与散热方案。

四、典型应用场景

  • 精密 A/D、D/A 参考电源
  • 电池供电便携设备的低功耗基准
  • 电压监控与比较电路
  • 传感器供电与偏置电路
  • 工业控制与数据采集系统的本地参考

五、性能解读与设计注意事项

  • 低静态电流(13μA):非常适合电池供电或待机功耗受限的系统,但当需要驱动更高负载电流时,要保证外部限流元件提供足够的电流余量。
  • 温度系数 80ppm/℃:约等于 0.008%/℃,例如在 0–70℃ 全温区内理论温漂累计可达约 0.56%,在需要极高长期稳定性的场合需搭配温度补偿或选择更低 TC 的参考源。
  • 噪声 120μVrms(10Hz–10kHz):对中等精度的 ADC/DAC 通道通常足够;若对低频噪声敏感,建议在参考端增加合适的去耦/滤波电容以进一步降低噪声。
  • 稳压起始电流:器件要求最小阴极电流为 13μA 才能保证进入稳压区,设计限流电阻时必须考虑最小输入电压和最大负载情况,避免低电流工况下输出漂移。
  • 封装散热:SOT‑23 封装散热能力有限,长时间接近 20mA 输出时须评估功耗及 PCB 散热路径。

六、封装与订购信息

  • 封装:SOT‑23,适合表面贴装(SMT)工艺,常见于空间受限的应用场合。
  • 包装形式:/TR 表示卷带盘装(Tape & Reel),方便 SMT 自动贴片与批量生产。
  • 品牌与型号:HGSEMI(华冠) LM385M3‑2.5/TR。订购时请核对完整料号与规格参数,参考厂家最新数据手册以获得详细引脚定义与典型特性曲线。

七、选型建议

若追求超低噪声或超高温稳定性,可考虑带有专门噪声抑制引脚或更低温漂(ppm/℃)的高端基准芯片;但在成本、空间与功耗受限的通用场合,LM385M3‑2.5 提供了良好的平衡:低静态电流、合适的输出驱动能力和紧凑封装,使其成为便携设备和一般精密模拟前端的常用选择。

如需进一步协调电路设计(限流电阻计算、去耦电容建议、温漂叠加估算等),可提供具体电源电压、负载条件与工作环境,我可以协助做精确计算与电路建议。

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