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Mingda Micro MD7333
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MD7333
- Type
- Mingda Micro
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 220mV@(100mA)
- Electronic Component
- Electronic Component
- Electronic Component
- MD7333
- Electronic Component
- 1
- Package
- SOT-89-3
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.025g
- Electronic Component
- 1
- Features
- Electronic Component
- Electronic Component
- BM0264548269
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 18V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 300mA
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MD7333 产品概述
一、概述
MD7333 是明达微推出的一款低压差线性稳压器（LDO），固定输出 3.3V，最大输出电流 300mA，采用 SOT-89-3 小型封装。器件针对低功耗、低噪声及便携式应用优化，具有极低的静态电流和可靠的短路保护，适合对尺寸、效率和成本有综合要求的电源方案。
二、主要规格亮点
- 输出类型：固定（3.3V）
- 最大输出电流：300mA（单通道）
- 压差（Dropout）：220mV @ 100mA（低压差特性，有利于低输入余量工作）
- 静态电流（Iq）：2.5μA（超低待机功耗，适合电池供电和节能场景）
- 功能特性：短路保护（提升系统可靠性）
- 工作温度：-40℃ ~ +85℃（Ta）
- 输出极性：正极输出
- 封装：SOT-89-3（小体积，便于空间受限设计）
三、应用场景
MD7333 适用于多种需要稳压 3.3V 的场合，特别是：
- 电池供电的便携设备、传感器节点与可穿戴设备（低静态电流延长待机时间）
- 物联网终端、无线模块及 MCU 电源（低噪声、低压差利于稳定工作）
- 消费电子、工业控制中的辅助电源或边沿电源方案
- 任何需要短路/过流保护并要求小封装的场合
四、设计与布局建议
- 输入电压：保证 Vin 高于 Vout 加上压差余量。以 100mA 下 220mV 为参考，Vin 最低需 ≈3.52V；在 300mA 满载时，建议预留更大余量（通常 3.8V ~ 5V 区间更为稳健），并考虑器件压差随电流上升的影响。
- 散热管理：线性稳压功耗由 (Vin - Vout) × Iout 决定。SOT-89 封装散热有限，需通过 PCB 增加铜箔面积并优化过孔散热以降低结温，避免热关断或过热降额。
- 输入/输出电容：为保证稳定性与瞬态响应，推荐在输入端和输出端放置低 ESR 的去耦电容（参照芯片详细资料选择容量与 ESR 范围）。在布局上，电容应尽量靠近器件引脚放置。
- 保护与测试：即便器件内置短路保护，建议在系统层面预留熔断或限流保护以应对异常工况；原型验证时关注热漂移和负载瞬态响应。
五、封装与选型注意
SOT-89-3 封装利于体积受限的板级设计，但热阻相对较高，需在高功率或连续满载场合考虑更大散热方案或更低压差/更高效率的替代方案。选择器件时应核对完整数据手册中的电气特性曲线、热特性和典型应用电路，以确保在目标工况下满足电压精度、温度系数与可靠性要求。
六、总结
MD7333 以其 3.3V/300mA 的输出能力、220mV（@100mA）低压差与 2.5μA 的超低静态电流，为电池供电与空间受限的应用提供了高性价比的线性稳压方案。合理的输入余量、良好的 PCB 散热设计和恰当的旁路电容布局，是确保 MD7333 在实际应用中发挥稳定性能的关键。建议在最终设计前参考明达微完整数据手册进行电气与热性能验证。
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