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Mingda Micro MD53R33
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MD53R33
- Type
- Mingda Micro
- Minimum package
- 3000 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 200mV@(200mA)
- Electronic Component
- Electronic Component
- Electronic Component
- MD53R33
- Electronic Component
- 1
- Package
- SOT-23-5
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.042g
- Electronic Component
- 1
- Electronic Component
- BM0264391034
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 10V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- Output Current
- 500mA
- 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.
MD53R33 产品概述
一、产品简介
MD53R33 是明达微推出的一款高性能、超低静态电流的线性稳压器（LDO），固定输出3.3V，单通道输出，封装为 SOT-23-5。器件面向便携与低功耗系统设计，集成使能控制与短路保护，工作环境温度范围为 -40℃ 至 +85℃（Ta）。
二、主要性能与参数
- 输出电压：3.3V（固定）
- 最大输出电流：500mA
- 工作电压（输入端）：最大 10V（器件允许范围请参考规格书）
- 压差（典型）：200mV @ 200mA（在更大电流下压差会相应增加）
- 电源纹波抑制比（PSRR）：65dB（中低频段表现优异）
- 静态电流（Iq）：约 100nA，极低待机耗电，适合电池供电系统
- 工作温度：-40℃ ~ +85℃（Ta）
- 输出极性：正极输出
三、功能特性
- 使能（EN）控制：方便系统电源管理与软启动（具体使能电平请参考数据手册）。
- 短路保护 / 限流：内置保护机制，提高系统可靠性。
- 固定输出，单通道设计，适合对3.3V电源有稳定性与噪声要求的负载。
四、封装与热管理
- 封装：SOT-23-5，体积小，便于表面贴装。
- 热设计提示：线性稳压器的功耗等于 (Vin - Vout) × Iout。例如，Vin=5V、Iout=500mA 时，耗散约 0.85W；若 Vin 接近 10V，耗散可达 3.35W，SOT-23-5 封装需通过 PCB 铜箔散热或降低压差来避免过热。建议在板上做足够的散热铜箔/热沉并留意热阻与总功耗预算。
五、典型应用场景
适用于各种对低噪声、低静态电流和中等输出电流要求的应用，如：
- 电池供电的物联网节点与便携设备；
- 单片机、传感器、射频前端供电；
- 工业控制模块与消费电子内部稳压电源。
六、设计注意事项与推荐外部元件
- 输入端建议放置至少 1µF 的陶瓷去耦电容以抑制输入纹波；
- 输出端建议使用 1µF ～ 10µF 的低 ESR 陶瓷电容（布局靠近输出引脚），以保证稳压环路稳定性与瞬态响应；
- 使能脚与地或控制信号的连接应避免噪声误触发；
- 布局要点：输入/输出电容尽量靠近器件引脚，缩短回流环路，采用地平面并在器件下方设计散热铜箔和必要的过孔。
七、结语
MD53R33 以其超低静态电流与良好的 PSRR 在便携与低功耗应用中具有明显优势。对于需在有限空间内提供稳定 3.3V、同时兼顾电池寿命与电源噪声的系统，MD53R33 是一款值得优先考虑的 LDO 解决方案。使用时请结合实际输入电压、输出电流与热管理方案进行功耗评估与 PCB 设计，确保可靠工作。
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