WMSIC Electronic Components

HTC LM78L05D

ModelLM78L05D
PackageSOP-8
BrandHTC
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 25+

Available for RFQ

Technical data

Product details

19 specifications

Core information

Product name
HTC LM78L05D
Type
HTC
Minimum package
2500 圆盘

Technical parameters

Electronic Component
Electronic Component
Electronic Component
1.7V@(40mA)
Electronic Component
HTC
Electronic Component
42uV
Electronic Component
LM78L05D
Electronic Component
1
Package
SOP-8
Electronic Component
Linear Regulator(LDO)
Electronic Component
0.125g
Electronic Component
1
Electronic Component
BM0230009534
Operating Temperature
40℃~+125℃@(Tj)
Operating Voltage
20V
Output
Electronic Component
Output Voltage
5V
Output Current
100mA

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

LM78L05D 线性稳压器(HTC,SOP-8)

一、产品简介

LM78L05D 为固定输出的线性稳压器,输出为正极单路 5.0V,额定输出电流 100mA。器件采用 SOP-8 封装,适合对体积和成本敏感且要求稳压精度与可靠保护功能的中低功耗电源场景。工作电压上限 20V,工作结温范围 -40℃ ~ +125℃,在工业级温度范围内表现稳定。

二、主要电气参数

  • 输出电压:5.0V(固定)
  • 最大输出电流:100mA
  • 工作电压(输入):最高 20V
  • 压差(Dropout):1.7V @ 40mA(实际压差随电流变化)
  • 静态电流(Iq):3.8mA
  • 电源纹波抑制比(PSRR):49dB @ 120Hz
  • 输出噪声:约 42μV
  • 输出极性:正极,单通道

三、功能与保护

  • 短路保护:内置限流或恒流特性,在输出短路或过载情况下限制电流,保护自身与负载。
  • 热关断:当结温超过安全阈值时自动关闭输出,待温度下降后恢复工作,避免因过热造成损伤。

四、性能特点

  • 低噪声、高抑制纹波:PSRR 49dB(120Hz)与 42μV 的噪声指标,使其在模拟和数字混合电路中能提供干净电源。
  • 低静态电流:3.8mA 的待机电流适用于电池供电或低功耗系统(需结合整体功耗评估)。
  • 稳定可靠:固定输出、内置保护,利于快速设计与可靠性提升。

五、典型应用

  • 低功耗嵌入式系统、单片机供电(5V)
  • 传感器模块、模拟前端电源
  • 工业控制、通信设备的辅助电源
  • 教育与实验平台、电源适配器的次级稳压

六、设计与使用建议

  • 输入电压须高于输出电压加压差(Vin ≥ Vout + Vdrop),建议留足裕量以保证稳定输出;若工作电流接近 100mA,应注意功耗。
  • 功耗估算:Pd = (Vin - 5V) × Iout。若 Pd 较大,应采取散热措施或降低 Vin。
  • 输出与输入电容:为保证瞬态响应与稳定性,建议在输入端并靠近引脚放置 0.11μF 陶瓷去耦电容,输出端并联 110μF 电解或钽电容(具体取值可按系统需求调整)。
  • PCB 布局:地线短且粗,输入/输出去耦电容靠近器件端脚放置,避免长回流环路以降低噪声与环路干扰。
  • 环境与可靠性:在高环境温度或高散热环境,应评估结温与功耗,必要时考虑外部散热或选用大功率封装。

七、封装与注意事项

  • 封装:SOP-8,便于表面贴装和自动化装配。
  • 品牌:HTC。
  • 采购与替代:在选型时注意与实际系统的最大输入电压、输出电流和热条件匹配;若需更低压差或更高电流,可考虑低压差稳压器(LDO)或开关电源替代。

本产品适用于要求简单、可靠、低噪声 5V 电源的场景,具备基本的保护功能与便于布局的封装,是常见的通用线性稳压解决方案。

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