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HGSEMI LM7909CT
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM7909CT
- Type
- HGSEMI
- Minimum package
- 50 管装
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.5V@(1A)
- Electronic Component
- HGSEMI
- Electronic Component
- 190uV
- Electronic Component
- LM7909CT
- Electronic Component
- 1
- Package
- TO-220-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 2.753g
- Electronic Component
- 1
- Electronic Component
- BM0264336361
- Operating Temperature
- 20℃~+125℃@(Ta)
- Operating Voltage
- 25V
- Output
- Electronic Component
- Output Voltage
- 9V
- Output Current
- 1.5A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM7909CT 产品概述
一、产品简介
LM7909CT 是华冠（HGSEMI）推出的固定输出型负电压线性稳压器，输出电压为 -9V，最大输出电流可达 1.5A。芯片内部集成限流保护、热关断及短路保护等多重安全机制，适合为模拟电路、运放、传感器及通信等系统提供稳定的负电源。
二、主要规格
- 输出极性：负极（固定 -9V 输出）
- 最大输出电流：1.5A
- 工作电压（绝对输入建议）：25V（器件标称工作上限）
- 压差（Dropout）：典型 1.5V @ 1A（设计时须保证输入电压至少高于输出电压 1.5V 以上）
- 静态电流（Iq）：5mA
- 输出噪声：190 µV（典型）
- 电源纹波抑制比（PSRR）：60 dB @ 120 Hz（对 120Hz 纹波有 ≈1000 倍衰减）
- 工作温度范围：-20℃ ~ +125℃（Ta）
- 输出类型：固定输出、单通道
- 封装：TO-220-3
- 品牌：HGSEMI（华冠）
三、保护与可靠性
LM7909CT 内置多重保护：限流保护、过流保护与短路保护可防止过载或输出短路造成器件和系统损坏；热关断功能在器件过热时自动断开输出来避免热失控。配合适当的散热与保护电路，可实现长期可靠工作。
四、典型应用
- 双轨电源系统的负电源部分（与正电压稳压器配合）
- 运算放大器、精密模拟前端供电
- 仪器仪表、测量模块的参考负电源
- 通信设备、工业控制与消费电子中需要 -9V 的场合
五、使用建议与注意事项
- 输入电压要求：由于压差在 1A 时典型为 1.5V，若需满载 1.5A，请预留更大的输入裕量并考虑纹波；一般建议输入电压 ≥ Vout + 2V ~ 3V 以确保稳定输出。
- 旁路电容：为保证瞬态响应与稳定性，建议在输入端和输出端分别并联适当的去耦电容（常见做法为输入侧的电解/薄膜电容与输出侧的高频旁路电容），并注意输出端电容的等效串联电阻（ESR）对稳定性的影响。
- 热管理：在高电流或输入输出电压差较大时，器件功耗显著（P = (Vin - Vout) × Iout），需配合合适散热片或机箱散热以避免进入热关断。
- 接线与布局：力求输入、输出及地线短且粗，减小寄生阻抗和环路面积，地线回路应独立处理以降低噪声耦合。
六、封装与机械信息
LM7909CT 采用工业常用的 TO-220-3 封装，方便外部安装散热片或直接螺栓固定到公共散热体。具体引脚排列与机械尺寸请参照华冠官方数据手册，并遵循推荐的安装扭矩与绝缘间隔要求。
七、总结与资料获取
LM7909CT 提供稳定的 -9V/1.5A 输出，具备低噪声、良好纹波抑制及完善的保护功能，适用于需要可靠负电源的各类电子系统。更多详细电气特性、典型应用电路与机械尺寸请参阅 HGSEMI（华冠）官方数据手册。
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