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UMW 78M05
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- UMW 78M05
- Type
- UMW
- Minimum package
- 2500 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 2V@(500mA)
- Electronic Component
- UMW
- Electronic Component
- 40uV
- Electronic Component
- 78M05
- Electronic Component
- 1
- Package
- TO-252
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.438g
- Electronic Component
- 1
- Electronic Component
- BM0227324857
- Operating Temperature
- 20℃~+85℃
- Operating Voltage
- 35V
- Output
- Electronic Component
- Output Voltage
- 5V
- Output Current
- 1A
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
78M05 产品概述
一、产品简介
78M05 是友台半导体（UMW）推出的一款固定输出线性稳压器（LDO），为单通道正极输出设计，输出电压固定为 5V，最大输出电流可达 1A。该器件适用于对噪声、纹波抑制和可靠性有较高要求的电源后端稳压场合，可作为开关电源的后级滤波/稳压或直接为数字/模数电路供电。
二、主要特性
- 输出电压：5V（固定型）
- 最大输出电流：1A
- 工作电压（输入）：35V（器件额定）
- 压差（Dropout）：2V @ 500mA（在更高电流时压差会相应上升）
- 静态电流（Iq）：约 6mA（典型）
- 电源纹波抑制比（PSRR）：80dB @ 120Hz
- 典型噪声：40µV
- 保护功能：内置短路保护与过热保护（自动热关断）
- 工作温度范围：-20°C ~ +85°C
- 输出极性：正极输出
- 输出通道数：1
- 品牌与封装：UMW（友台半导体），TO-252（DPAK）
三、电气性能要点
78M05 在 120Hz 下具有高达 80dB 的 PSRR，适合抑制来自整流滤波或开关电源低频纹波；40µV 的典型噪声保证了对模拟信号链和 ADC 前端的电源清洁度。静态电流 6mA 在多通道或电池供电场合有一定耗电考虑，但相比高性能 LDO 已属合理范围。给出 2V@500mA 的压差值，设计时需保证输入电压足以覆盖该压差及负载和瞬态裕量。
四、封装与热性能
TO-252（DPAK）封装便于表面贴装并拥有良好的散热路径。实际 PCB 设计中建议在焊盘下及引脚处配置较大铜箔散热面和热 vias，以提升功耗承载能力。在连续 1A 输出且压降较大时，器件会产生显著热量，需评估热阻并采用合适的散热设计以避免进入热关断保护。
五、典型应用
- 开关电源后级线性滤波与稳压
- 工业控制、仪表与传感器供电
- 嵌入式系统与单片机稳压电源
- 音频前端、模拟电路和 ADC/DAC 供电场景
- 通讯设备、消费电子等需要低噪声稳定电压的场合
六、使用建议与注意事项
- 输入输出端均应配合旁路电容以保证稳定性与瞬态响应；推荐在输出并联低 ESR 的电容与 0.1µF 陶瓷，以减少噪声和振荡风险。
- 当输出接近 1A 或输入与输出电压差较大时，应注意设备发热，必要时在 PCB 上增加散热铜箔或外部散热体。
- 参照系统最大输入电压 35V 选用上游器件，避免输入瞬态超过额定值。
- 如果系统对静态功耗极为敏感，可评估是否采用低 Iq 型器件或在空闲时断电控制。
七、采购与型号信息
型号：78M05（UMW/友台半导体）
封装：TO-252（DPAK）
在选型与采购时，请以厂商最新规格书为准，确认温度范围、最大功耗与封装管脚定义，并参考厂商推荐的 PCB 布局与旁路电容方案以确保长期可靠运行。
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