Model & package intelligence
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79L05
Configuration
1 options
Configuration
Electronic Component
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- YONGYUTAI 79L05
- Type
- YONGYUTAI
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.7V
- Electronic Component
- YONGYUTAI
- Electronic Component
- 40uV
- Electronic Component
- 79L05
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.11g
- Electronic Component
- 1
- Electronic Component
- BM0265080635
- Operating Temperature
- 0℃~+150℃@(Tj)
- Operating Voltage
- 30V
- 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.
79L05 产品概述 — YONGYUTAI（永裕泰） 固定线性负电压稳压器
一、产品简介
79L05 是永裕泰推出的一款固定输出的线性低压差（LDO）负电压稳压器，标称输出 -5V，单通道设计，适用于对负电源轨有中小电流需求的便携和工业设备。器件采用 SOT-89-3 小型封装，体积小、布局简单，适合空间受限的电路板设计。
二、主要性能参数
- 输出类型：固定（-5V）
- 输出极性：负极（负电压输出）
- 最大输出电流：100 mA
- 静态电流（Iq）：6 mA（典型）
- 压差（Dropout）：1.7 V（典型）
- 工作电压范围（耐受）：30 V（器件允许的最大输入电压标称）
- 电源纹波抑制比（PSRR）：49 dB @ 120 Hz
- 输出噪声：40 µV（典型）
- 工作结温：0 ℃ ~ +150 ℃（Tj）
- 封装：SOT-89-3，单输出通道
三、封装与热管理
SOT-89-3 封装体积小，但热阻相对较高。设计时需关注功耗：Pn ≈ |Vin - Vout| × Iout。满载或在较大输入-输出压差下工作时，应评估结温并在必要时采取散热措施（加铜箔散热或改用更大封装）。板级散热和良好接地有助于提高可靠性。
四、设计与使用建议
- 输入/输出端应并联适当的旁路电容以保证稳定性和低噪声：推荐输入侧 0.1 µF 旁路电容+1 µF10 µF，输出侧采用低 ESR 电容（如 1 µF10 µF）。
- 由于压差为 1.7 V，实际输入电压的幅值应比输出幅值大至少 1.7 V，建议留有约 2 V 的裕量以保证在负载和温漂下仍保持稳压。
- 对于要求更低噪声或更高 PSRR 的应用，应在输入端加滤波网络，并尽量缩短输入/输出导线长度。
- 考虑到静态电流为 6 mA，电池供电系统需评估待机功耗。
五、典型应用场景
- 运放、模拟前端的负电源生成
- 传感器和数据采集系统中需要稳定负电压轨的模块
- 工业控制、通信设备中的小功率负轨供电
- 便携式仪器和电池供电设备（需注意静态电流对续航的影响）
总结：79L05（YONGYUTAI）以其固定 -5V 输出、较低噪声和良好 PSRR 适合中小功率负电源场合。合理的电容选型与热管理，是获得稳定可靠性能的关键。
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