WMSIC Electronic Components

LOWPOWER LP3992-28B5F

ModelLP3992-28B5F
PackageSOT-23-5
BrandLOWPOWER
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 24+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
LOWPOWER LP3992-28B5F
Type
LOWPOWER
Minimum package
3000 个

Technical parameters

Electronic Component
Electronic Component
Electronic Component
220mV@(300mA)
Electronic Component
LOWPOWER
Electronic Component
300uVrms
Electronic Component
LP3992-28B5F
Electronic Component
1
Package
SOT-23-5
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.024g
Electronic Component
1
Features
Output
Electronic Component
BM0229474278
Operating Temperature
40℃~+125℃@(Tj)
Operating Voltage
5.5V
Output
Electronic Component
Output Voltage
2.8V

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

LP3992-28B5F 产品概述

一、简介

LP3992-28B5F 是 LOWPOWER(微源半导体)推出的一款固定输出型低压差线性稳压器(LDO),为单路正输出设计。该器件在低静态电流与较高负载能力之间取得平衡,适合对噪声与电源抑制有要求的便携与嵌入式系统。器件采用 SOT-23-5 小型封装,便于空间受限应用。

二、主要参数

  • 输出类型:固定电压
  • 输出电压:2.8V
  • 工作电压(VIN):5.5V
  • 最大输出电流:300mA
  • 压差(Dropout):220mV @ 300mA
  • 静态电流(Iq):75µA(典型)
  • 电源纹波抑制比(PSRR):76dB @ 1kHz
  • 输出噪声:300µVrms
  • 保护功能:过流保护、热关断
  • 工作温度范围:-40℃ ~ +125℃(Tj)
  • 封装:SOT-23-5
  • 输出极性:正极,单通道

三、性能与优势

  • 低压差:220mV 的压差在满载 300mA 时能保证在较低输入电压下稳定提供 2.8V 输出,有利于延长电池工作时间。
  • 低静态电流:75µA 静态电流适合能耗敏感的便携设备,降低待机耗电。
  • 高 PSRR 与低噪声:76dB@1kHz 的抑制比和 300µVrms 的噪声性能,适合对模拟、无线射频或精密 ADC 供电的场景,减少电源干扰对系统性能的影响。
  • 可靠的保护机制:内置过流保护与热关断,可在异常工作条件下保护器件与负载,提升系统可靠性。

四、典型应用

  • 便携式设备与移动终端的基准或模拟电源
  • 无线通信模块与收发前端的低噪声供电
  • 传感器、数据采集与 ADC/DAC 的参考电源
  • 工业与汽车电子中对稳压与温度范围要求较高的子系统

五、使用注意与布局建议

  • 输出电容:为保证稳定性与良好瞬态响应,建议在输出端配置适当容量的低 ESR 电容(典型选择 1µF~10µF 的陶瓷电容),并将电容尽可能靠近器件引脚布置。
  • 输入去耦:输入端建议并联一个 0.1µF~1µF 的陶瓷电容以抑制高频干扰,并保证稳压器 VIN 引脚有稳定电源。
  • 热管理:在高负载与较大压降情况下,器件功耗上升,需关注 PCB 散热路径与铜箔面积,必要时降低输入电压或限制持续输出电流以避免进入热关断。
  • 布局原则:减少引线长度,优化地线回流,避免开关噪声靠近敏感模拟回路。

六、封装与可靠性

LP3992-28B5F 提供 SOT-23-5 小型封装,适合批量制造与自动贴片。器件额定工作结温范围 -40℃ 到 +125℃(Tj),满足工业级环境要求。购买与替换时请注意匹配封装与焊接工艺,确保散热与电气性能符合系统设计规范。

总结:LP3992-28B5F 在低功耗、低噪声与良好电源抑制之间表现均衡,适用于对稳定 2.8V 电源有要求的便携与工业应用。设计时关注输入/输出去耦与热设计,可发挥该器件的最佳性能。

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