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HGSEMI LM7809S/TR LM7809S
Configuration
1 options
Configuration
24+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM7809S / TR
- Type
- HGSEMI
- Minimum package
- 500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- HGSEMI
- Electronic Component
- 58uV
- Electronic Component
- LM7809S/TR
- Electronic Component
- 1
- Package
- TO-263-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.386g
- Electronic Component
- 1
- Electronic Component
- BM0227752157
- Operating Temperature
- 0℃~+125℃@(Ta)
- Operating Voltage
- 35V
- Output
- Electronic Component
- Output Voltage
- 9V
- Output Current
- 1.2A
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM7809S/TR 产品概述
一、产品简介
LM7809S/TR 是华冠（HGSEMI）推出的一款固定输出线性稳压器，输出电压为 9V，输出电流可达 1.2A。该器件采用 TO-263-3 封装，适合需要稳定、低噪声正电压源的工业与消费类电路。作为经典三端线性稳压系列的一员，LM7809S/TR 提供了简单可靠的电源解决方案，便于设计与装配。
二、主要技术参数
- 输出类型：固定（9V）
- 最大工作电压：35V（器件额定输入电压）
- 最大输出电流：1.2A（连续）
- 电源纹波抑制比（PSRR）：56dB @ 120Hz
- 输出噪声：58µV（典型）
- 工作温度范围：0℃ ~ +125℃（Ta）
- 输出极性：正极
- 输出通道数：单通道
- 保护特性：短路保护、过热保护
- 封装：TO-263-3（SMT 大功率散热型）
三、性能与保护特性
LM7809S/TR 在中等输入纹波抑制方面表现良好，56dB @120Hz 的 PSRR 能显著抑制来自整流电源的低频纹波，结合 58µV 的低噪声特性，使其适用于对噪声敏感的前端电路（如低频模拟放大器、传感器供电等）。内部集成短路限流与热关断保护，可在过载或短路条件下自动保护器件与外部负载，提高系统可靠性。
四、封装与热管理建议
TO-263-3 为平面散热型封装，便于表面贴装与 PCB 大面积铜箔散热。由于为线性稳压器，功耗近似等于 (Vin − 9V) × Iout，工作时热量可能较大。建议：
- 在 PCB 上为器件提供充足的散热铜箔（底层散热面或散热孔）；
- 必要时在封装附近留出热走线或增加金属散热片；
- 在高输入电压或接近 1.2A 输出时，注意温升并进行热仿真或测温验证。
五、典型应用场景
- 工业控制与自动化电源模块
- 仪表与数据采集前端供电（低噪声要求）
- 通信设备与外围模拟电路供电
- 各类嵌入式系统的局部线性稳压输出
六、外部元件与布局建议
为保证稳压器稳定与瞬态响应，推荐在输入与输出端并接旁路电容：
- 输入端：可并联 0.33µF～1µF 陶瓷或薄膜电容与 10µF 以上电解电容，用以抑制输入源阻抗变化；
- 输出端：建议 0.1µF 陶瓷旁路 + 10µF 电解/固态电容以改善瞬态响应与稳定性。
布线应尽量缩短输入/输出回路路径，地线采用单点或大面积接地以降低接地噪声。
七、选型与使用注意事项
- 输入电压须高于 9V 并保留足够余量以满足稳压器的串联压降，建议在系统设计时考虑最坏工况的热耗散与电源余量；
- 若系统对效率或功率损耗敏感，应考虑使用开关电源或外接串联器件以降低线性功耗；
- 实际引脚排列与封装标注以器件出厂数据手册为准，生产批次或包装（TR 卷带）亦需确认。
LM7809S/TR 以其稳定的输出、较低噪声和完善的保护功能，适合要求可靠性与易用性的中低功率固定电压供电场合。
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