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Mingda Micro MD7218E40QC3
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MD7218E40QC3
- Type
- Mingda Micro
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 650mV@(1A)
- Electronic Component
- Electronic Component
- Electronic Component
- MD7218E40QC3
- Electronic Component
- 1
- Package
- SOT-23-5L
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.042g
- Electronic Component
- 1
- Electronic Component
- BM0264548268
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 15V
- Output
- Electronic Component
- Output Voltage
- 4V
- Output Current
- 1A
- Output Type
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MD7218E40QC3 产品概述
一、产品简介
MD7218E40QC3 是明达微推出的一款高性能线性稳压器（LDO），固定输出 4.0V，最大输出电流 1A，单通道 SOT-23-5L 封装。器件针对便携与工业级电源抑制与低静态功耗场景优化，工作温度范围 -40℃ 至 +85℃，集成短路保护、过流限制与热关断功能，适合对噪声与稳定性要求较高的系统电源设计。
二、主要性能参数
- 输出电压：4.0V（固定）
- 最大输出电流：1A
- 压差（Dropout）：650mV @ 1A（典型）——在满载时要求 Vin ≥ Vout + 0.65V
- 电源纹波抑制比（PSRR）：71dB @ 10Hz（优秀的低频抑制能力）
- 静态电流（Iq）：1.6µA（超低待机功耗）
- 保护功能：短路保护、过流限制、热关断
- 工作输入建议：建议工作输入范围约 4.65V ~ 15V（器件能承受短时 18V 耐压），具体以数据手册为准
- 封装：SOT-23-5L，品牌：明达微
三、典型应用场景
- 电池供电设备与便携式终端（需低静态电流延长待机时间）
- 精密模拟前端、传感器供电（高 PSRR 有利于抑制输入噪声）
- 工业控制电路、通信终端及外围供电模块
- USB/车载电源管理（需注意输入瞬态和功耗散热）
四、优势亮点
- 低静态电流（1.6µA）在待机或休眠模式下极大降低系统耗能。
- 71dB @10Hz 的 PSRR 对低频电源噪声抑制显著，利于模拟信号完整性。
- 650mV 的低压差在 1A 负载下能在较低输入电压时维持稳压输出。
- 完善的保护机制提升系统可靠性，便于在复杂应用中无需外加大量保护电路。
五、封装与热管理建议
SOT-23-5L 封装体积小，但热阻较大。实际应用中需注意功耗与结温：
- 在高电压降或大电流条件下，功耗 P = (Vin - Vout) × Iout，计算并评估结温上升。
- PCB 布局建议使用加大散热铜箔、连接底层地平面及必要的热过孔，以降低热阻并提高持续输出能力。
六、典型外围与布局注意事项
- 输入端：近距离放置 1µF~10µF 陶瓷旁路电容，减小输入阻抗与吸收瞬态。
- 输出端：推荐 2.2µF~10µF 低 ESR 陶瓷或钽电容以保证稳态与瞬态响应，具体容量与 ESR 需参照器件稳定性要求。
- 引脚与走线：输入、输出与地线尽量短而粗，地线回流路径独立，避免噪声耦合至敏感模拟地。
- 保护与滤波：若输入存在高幅度瞬态或负载有大浪涌，建议在输入增加瞬态抑制器或串联电感/限流器。
MD7218E40QC3 以其低功耗、高 PSRR 与完整保护功能，是对噪声敏感且要求长待机、可靠性的中小功率系统的理想选择。欲了解完整电气特性、典型性能曲线及推荐外接元件参数，请参阅明达微官方数据手册。
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