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Mingda Micro MD5350
Configuration
1 options
Configuration
Date code within 2 years
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MD5350
- Type
- Mingda Micro
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 350mV@(500mA)
- Electronic Component
- Electronic Component
- Electronic Component
- MD5350
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.167g
- Electronic Component
- 1
- Features
- Electronic Component
- Electronic Component
- BM0264391039
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 10V
- 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.
MD5350 产品概述
一、产品简介
MD5350 属于明达微 MD53XX 系列正电压低压差稳压器，采用 CMOS 工艺设计，面向要求低功耗、高精度和较高耐压的便携与工业应用。器件提供固定 5.0V 输出，最大输出电流 500mA，最高允许工作电压可达 10V。内部采用低通态电阻的晶体管作为串联元件，使得输入输出压差（dropout）极低，适合电池或低压差电源场合使用。
二、主要性能特点
- 输出极性：正极，固定输出 5.0V
- 最大输出电流：500mA
- 工作电压上限：10V（耐压良好）
- 压差：350mV @ 500mA（低压差设计）
- 静态电流 Iq：典型 1.2µA（超低待机功耗，利于电池供电）
- PSRR：40dB @ 100Hz（良好纹波抑制能力）
- 集成短路保护，增强系统可靠性
- 工作温度范围：-40℃ ~ +85℃（Ta）
- 输出类型：固定单路输出
- 封装：SOT-89-3（小尺寸、便于安装）
三、电气参数（典型值）
- 输出电压：5.0V（固定）
- 最大输出电流：0.5A
- 压差（Dropout）：≈0.35V @ 0.5A
- 静态电流：≈1.2µA
- PSRR：≈40dB @ 100Hz
（注：以上为典型/标称值，具体参数请参考器件最终数据手册）
四、应用场景
- 电池供电设备与便携式电子产品（因超低静态电流）
- 传感器节点、物联网终端、电量敏感模块
- 工业控制与通讯设备中需 5V 参考或供电的子系统
- 对电源纹波和噪声有一定要求的模拟前端和数模混合电路
五、封装与热管理
MD5350 提供 SOT-89-3 封装，体积小、焊接方便。尽管具备短路保护，器件在高电流工作时仍会产生显著功耗（Pd ≈ (Vin − 5V) × Iout），建议在 PCB 设计中增加散热铜箔面积、加大地平面或热沉处理，以确保结温与环境温度在安全范围内，避免热限流或热降额带来的性能下降。
六、使用建议
- 在输入端和输出端并联去耦电容以保证环路稳定及提高 PSRR，典型做法为陶瓷电容（例如 1~10µF）与适当的旁路电容组合；具体容值和 ESR 需按最终系统验证。
- 设计时应计算最坏情况下的功耗并进行热仿真，保证在工作温度范围内有足够散热裕量。
- 虽然器件具备短路保护，长期异常负载仍会导致热应力，应在系统层面加入过流或过温保护策略。
- 推荐在输入端增加合适的输入滤波与浪涌抑制措施，提升稳定性与抗干扰能力。
MD5350 以其低压差、超低静态电流和良好纹波抑制的特性，适合对效率和待机功耗敏感，同时又需稳定 5V 输出的各类电子系统。有关更详细的电气特性曲线、引脚定义和典型应用电路，请参见明达微官方数据手册。
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