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HGSEMI LM78M05MP/TR LM78M05MP
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM78M05MP / TR
- Type
- HGSEMI
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V
- Electronic Component
- HGSEMI
- Electronic Component
- 40uV
- Electronic Component
- LM78M05MP/TR
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.297g
- Electronic Component
- 1
- Electronic Component
- BM0229275329
- Operating Temperature
- 0℃~+125℃@(Tj)
- Operating Voltage
- 20V
- Output
- Electronic Component
- Output Voltage
- 5V
- Output Current
- 500mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LM78M05MP/TR 产品概述
一、产品简介
LM78M05MP/TR 是华冠（HGSEMI）推出的一款固定输出的线性稳压器，输出为正5V、单通道设计，最大输出电流可达500mA。器件采用SOT-223封装，适合中小功率板载稳压场景，集成短路保护与过热关断，可靠性高，适用于工业与消费类电源应用。
二、主要电气参数
- 输出电压：5.0V（固定）
- 最大输出电流：500mA
- 最大工作电压（Vin）：20V（器件耐压上限，请按规范留有余量）
- 压降（Dropout）：典型 2V（保证正常输出时输入电压需 ≥7V）
- 静态电流（Iq）：约 6mA（空载静态损耗，需考虑对电池系统的影响）
- 电源纹波抑制比（PSRR）：62dB @ 120Hz（对工频纹波抑制能力良好）
- 噪声：约 40µV（典型值，有利于模拟和精密电路）
- 工作结温：0℃ ~ +125℃（Tj）
三、保护与可靠性
LM78M05MP/TR 内置短路电流限制与过热关断功能。当输出出现短路或过载时，电流限制机制起作用以保护芯片；若因功耗过大导致结温升高至保护门限，过热关断将自动断开输出，待温度恢复后恢复工作。这些保护特性提升了系统安全性与长寿命表现。
四、封装与热管理
该器件采用 SOT-223 封装，具有较好的板级散热能力。由于为线性稳压器，功耗主要为 (Vin - 5V) × Iout，设计时须估算最大功耗并做好散热规划。例如在 Vin=12V、Iout=500mA 时，器件需耗散约3.5W的热量，必须通过充足的 PCB 铜箔或外接散热片降低结温。建议在高功率工况下增大铜箔面积并靠近封装引脚和散热片布线。
五、典型应用与使用建议
- 典型应用：单片机供电、传感器与模拟前端、通信模块、电源模块预稳压、工业控制与仪表等。
- 输入电容：建议靠近输入端并并联一个 0.33µF（或 1µF）陶瓷小电容与一个适当容量的电解电容（如 10µF）以滤除低频波动与储能。
- 输出电容：建议并联 0.1µF 陶瓷用于高频去耦，同时安排 4.7~10µF 的电解或钽电容以改善瞬态响应与稳定性。
- 布局要点：输入与输出线尽量粗短，接地要集中；在高电流运行下增加 PCB 散热铜面积，避免器件长时间工作在热限附近。
六、选型与采购注意
LM78M05MP/TR 为固定 5V 输出、500mA 的标准线性稳压器，适合对噪声和纹波有中高要求但对效率要求不高的场景。若系统对效率敏感或差分压较大时建议选用开关稳压器或低压差（LDO）替代；若需更高电流或更低噪声，请参考厂方完整数据手册以核实极限与典型特性。
如需进一步的引脚定义、典型波形与完整电气特性曲线，请参阅华冠官方数据手册或联系供应商获取原始文件。
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