WMSIC Electronic Components

HGSEMI LM7905T

ModelLM7905T
PackageTO-220-3
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 Date code within 2 years

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HGSEMI LM7905T
Type
HGSEMI
Minimum package
1000 盒

Technical parameters

Electronic Component
Electronic Component
Electronic Component
HGSEMI
Electronic Component
LM7905T
Electronic Component
1
Package
TO-220-3
Electronic Component
Linear Regulator(LDO)
Electronic Component
2.817g
Electronic Component
1
Electronic Component
BM0229275326
Operating Temperature
25℃~+125℃
Operating Voltage
20V
Output
Electronic Component
Output Voltage
5V
Output Current
1A
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.

LM7905T(HGSEMI 华冠)产品概述

一、产品简介

LM7905T 是华冠(HGSEMI)出品的一款固定输出线性稳压器,提供稳定的负电压输出(-5V)。该器件采用 TO-220-3 封装,单通道设计,适合为运算放大器、模拟信号处理模块及双轨电源系统提供负电源轨。器件内建保护电路,便于在工业与通信等领域可靠工作。

二、主要性能与特点

  • 输出类型:固定(负电压,-5V)
  • 最大输出电流:1A(连续)
  • 静态电流(Iq):7.8mA
  • 过流保护:内置限流功能,防止短路或过载造成损坏
  • 过热保护:内置热关断,温度过高时自动保护并恢复
  • 工作温度范围:-25℃ ~ +125℃
  • 工作电压(器件额定条件):20V
  • 封装:TO-220-3,便于安装散热片并进行可靠焊接

三、典型应用场景

  • 双轨电源系统(为运放等提供负电源)
  • 模拟电路与信号处理模块
  • 工业控制设备、测量仪器的局部负电源
  • 通信设备与嵌入式系统中的电源管理

四、使用建议与典型电路注意事项

  • 输入、输出端建议配置旁路电容:输入端常用 0.33µF(陶瓷或钽电容)以抑制高频噪声,输出端常用 0.1µF 与适当的电解电容以改善瞬态响应与稳定性。具体数值应参考完整器件数据手册。
  • 长时间接近 1A 输出时需考虑散热:建议在 TO-220-3 外壳上安装合适散热片或采用铜箔散热设计以避免进入热关断。
  • 在上电或短路条件下,器件的过流与过热保护可提高可靠性,但设计时仍应预留充足安全裕量与保护电路(熔断器、限流等)。

五、封装与热管理

TO-220-3 封装利于机械固定与热传导,背部金属面可以通过螺丝与散热片紧固。对于连续高电流输出,应根据功耗(Vin - Vout)× Iout 计算耗散功率并选择相应散热方案,避免频繁触发热保护影响系统稳定性。

六、参数摘要

  • 品牌:HGSEMI(华冠)
  • 型号:LM7905T
  • 输出电压:-5V(固定)
  • 输出电流:1A
  • 静态电流:7.8mA
  • 工作温度:-25℃ ~ +125℃
  • 保护功能:过流保护、过热保护
  • 封装:TO-220-3

七、选型与注意事项

选择时请确认系统输入电压余量满足稳压器的压差要求,若输入与输出电压差过小,应选用低压差稳压器或升压方案。同时如需更高效率或更低功耗,可考虑开关型负电压转换器。最终设计与布局建议参考华冠提供的完整数据手册与典型应用电路,以保证性能与可靠性。

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