WMSIC Electronic Components

MICRONE ME431LAXG

ModelME431LAXG
PackageSOT-23
BrandMICRONE
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
MICRONE ME431LAXG
Type
MICRONE
Minimum package
3000 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
MICRONE
Electronic Component
ME431LAXG
Electronic Component
1
Package
SOT-23
Electronic Component
Voltage Reference IC
Electronic Component
±0.5%
Electronic Component
0.041g
Electronic Component
1
Electronic Component
BM0227604919
Operating Temperature
40℃~+85℃
Operating Voltage
2.5V~36V
Output Voltage
2.5V
Output Current
80mA
Output Type
Electronic Component
Electronic Component
Electronic Component

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

ME431LAXG 产品概述

一、产品简介

ME431LAXG(品牌:MICRONE / 南京微盟)是一款固定输出、精密的2.5V基准/稳压器器件,采用SOT-23小封装,适合空间受限的精密模拟电路。器件工作电压范围广(2.5V~36V),输出电压为2.5V,最大输出电流可达80mA,具有±0.5%的初始精度,能在-40℃至+85℃工业温度范围内稳定工作。最小阴极电流调节值为35µA,便于在低电流应用中保持基准稳定。

二、主要参数与性能亮点

  • 输出类型:固定(2.5V)
  • 输入/工作电压:2.5V ~ 36V,适配多种供电环境
  • 输出电流能力:最高可达80mA,支持中等负载
  • 初始精度:±0.5%,满足高精度基准需求
  • 最小阴极调节电流:35µA,低电流下仍能维持调节
  • 工作温度:-40℃ ~ +85℃
  • 封装:SOT-23,便于表贴及小尺寸设计

这些特性使ME431LAXG在需要精密参考电压、低功耗启动及中等电流驱动的场合表现出色。

三、典型应用场景

  • 精密ADC/DAC的参考电压源,提升测量线性与稳定性
  • 电池电压监测与电源监控电路
  • 精密比较器、温度测量及传感器接口的参考基准
  • 仪表放大器及精密信号调理模块
  • 小型系统中的局部基准或参考二极管替代品

四、使用要点与设计建议

  • 输入电压要求:作为基准源使用时,上游电压需高于或等于2.5V,且应通过限流元件(如串联电阻)或受控电源确保不超过器件承受的功耗。
  • 最小工作电流:为保证输出保持在额定精度范围内,阴极电流应不低于35µA;在轻载或休眠模式下应注意维持此最低电流。
  • 功耗与散热:若作为牺牲式(shunt)稳压使用,器件功耗可按 P = (Vin - 2.5V) × Iout 估算。设计时务必计算并确保SOT-23封装的散热能力不会被超限,必要时限制注入电流或改用散热更好的布局/封装。
  • 输出旁路与稳定性:在实际电路中,建议在输出端并联0.01µF~0.1µF的陶瓷电容以改善瞬态响应与降低噪声;布线尽量短、回流路径明确以减小环路干扰。
  • 噪声与纹波抑制:若用于高精度测量,建议在输入端增加LC或RC滤波,避免开关电源噪声通过输入影响参考精度。

五、封装与布局要点

  • SOT-23小封装利于面积受限的设计,但散热能力有限。若工作在较高差压和大电流条件下,需评估封装最大允许的耗散功率。
  • PCB布局建议将器件的参考引脚与被测放大器/ADC的参考引脚尽量靠近,减少噪声耦合。避免将热源或大电流回路与基准走线并行。

六、选型建议

如果系统需要固定且稳定的2.5V基准,且负载电流在器件允许范围内(≤80mA),ME431LAXG提供了较高的精度(±0.5%)和宽输入电压范围,是小型仪表、传感器前端与电源监控的理想选择。设计时重点关注最小阴极电流、功耗计算与封装散热,能保证长期稳定的参考输出。

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