Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
FUXINSEMI 79L05
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- FUXINSEMI 79L05
- Type
- FUXINSEMI
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 1.7V
- Electronic Component
- FUXINSEMI
- Electronic Component
- 40uVrms
- Electronic Component
- 79L05
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.139g
- Electronic Component
- 1
- Electronic Component
- BM0257583495
- 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.
79L05 产品概述
一、产品简介
79L05 是富芯森美（FUXINSEMI）推出的一款固定输出负电压线性稳压器（LDO），单通道输出，封装为 SOT-89-3，适合对体积、成本和稳定性有要求的负电源小功率场合。器件在工业温度范围内可靠工作，适用于通信、传感器、模拟前端等电路的负电压供给。
二、主要性能参数
- 输出类型：固定（负电压）
- 输出电压：-5V
- 最大输入电压：可支持至 30V（典型工作电压约 20V）
- 输出电流：最大 100mA
- 压差（Dropout）：1.7V（在额定负载下）
- 静态电流（Iq）：9mA
- 电源纹波抑制比（PSRR）：49dB @ 120Hz
- 输出噪声：40µVrms
- 工作结温：-40℃ ~ +125℃（Tj）
- 通道数：1
- 封装：SOT-89-3
- 品牌：FUXINSEMI（富芯森美）
三、典型特性与优势
- 低噪声、较高 PSRR，适合对电源纯净度有要求的模拟/混合信号系统。
- 较小的压差（1.7V）在低压差应用中减小功耗。
- SOT-89-3 小封装占板面积小，适合空间受限设计。
- 宽温度范围和工业级规格，可靠性高。
四、应用场景
- 运算放大器、模拟前端的负电压供电。
- 传感器、数据采集模块的参考/偏置电源。
- 工业控制、仪表和消费电子中小功率负电源需求。
五、典型电路与外部器件建议
- 为保证稳压器稳定工作并抑制瞬态响应，建议在输入端并接 0.1–1µF 陶瓷或钽电容，输出端并接 4.7–10µF 低 ESR 电容，电容尽量靠近引脚布局。
- 注意输入端电压需比输出电压更“负”至少压差值（≥1.7V），否则无法维持稳定输出。
- 热设计：功耗 P ≈ |Vin - Vout| × Iout。举例：若 Vin = -12V，Vout = -5V，Iout = 100mA，则 P ≈ 0.7W；SOT-89 的散热能力受 PCB 铜皮面积影响显著，建议扩大接地铜皮并增加散热通孔以降低结温。
- 考虑反向电流和上电顺序时加保护二极管或限流电阻。
六、封装与选型提示
SOT-89-3 封装适合波峰焊/回流焊装配，选型时确认管脚定义（输入、地、输出）和封装方向与电路板布局一致。若系统需要更高输出电流或更小噪声，可考虑更大封装或专用超低噪声器件。
七、注意事项
- 请参考完整数据手册确认最大额定值（输入电压上限、短路保护、热关断等）。
- 在高温或高压降工况下，应评估结温并适当降额使用以保证长期可靠性。
如需器件封装图、引脚排列或完整电气特性曲线，请索取富芯森美 79L05 的详细数据手册。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
