Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
Mingda Micro MD7218A33PA1
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MD7218A33PA1
- Type
- Mingda Micro
- Minimum package
- 1000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- 650mV@(1A)
- Electronic Component
- Electronic Component
- Electronic Component
- MD7218A33PA1
- Electronic Component
- 1
- Package
- SOT-89-3L
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.099g
- Electronic Component
- 1
- Electronic Component
- BM0264548275
- Operating Temperature
- 40℃~+85℃
- Operating Voltage
- 15V
- Output
- Electronic Component
- Output Voltage
- 3.3V
- 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.
MD7218A33PA1 产品概述
一、产品简介
MD7218A33PA1 是明达微推出的一款高瞬态响应的低压差线性稳压器（LDO），提供固定正极输出 3.3V，最大输出电流可达 1A。器件采用 SOT-89-3L 小封装，适用于空间受限且要求低噪声、低静态电流与良好纹波抑制的电源前端或嵌入式系统。
二、主要性能特点
- 输出电压：固定 3.3V，输出极性为正极；
- 工作电压：最高可达 15V 输入；
- 最大输出电流：1A；
- 压差（Dropout）：650mV @ 1A，适合中低压差应用；
- 静态电流（Iq）：仅 1.6µA，适合电池供电或低功耗待机场景；
- 电源纹波抑制比（PSRR）：71dB @ 10Hz，低频纹波抑制优异；
- 保护功能：内置短路保护、过流保护与热关断，提升系统可靠性；
- 工作温度范围：-40℃ ~ +85℃，适用于工业级温域。
三、封装与引脚建议
器件采用 SOT-89-3L 封装，具有较好的热阻与焊接可靠性。建议将输入电容靠近 VIN 引脚，输出端并联低 ESR 电容以保证瞬态性能与稳定性；地线采用短回流路径，利于降噪与散热。
四、应用场景
适合无线通信模块、MCU 电源、传感器前端、可穿戴与便携设备、工业控制电路等需要 3.3V 稳定电源、低功耗与高瞬态响应的场合。
五、设计注意事项
- 输入电压应保证高于输出电压加压差余量（例如 VIN ≥ 3.3V + 0.65V）并留有裕量以应对纹波与瞬态；
- 输出侧推荐配置合适容量与低 ESR 的陶瓷电容（如 4.7µF~10µF），以改善瞬态响应与稳定性；
- 在高功耗工作点注意 PCB 散热：增大铜箔面积或采用过孔导热，以降低结温并避免热关断触发；
- 保护功能为器件提供二次保障，但仍建议在系统层面考虑输入侧保险与滤波设计。
六、总结
MD7218A33PA1 以其低静态电流、良好 PSRR、较低压差与完整的保护特性，成为需要高瞬态性能与长待机寿命的 3.3V 电源设计的理想选择。凭借 SOT-89-3L 封装，器件在体积、性能与可靠性之间取得均衡，适用于多种嵌入式与便携式应用。
Request for quote
Send RFQ
Use the form for single models, category sourcing, and multi-line BOM requirements.
Product sourcing intelligence
Model, package, availability, and BOM fit reviewed before quotation.
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
BOM matching & alternatives
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Sourcing availability signal
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
Examples of how common component sourcing requests are organized.
Typical RFQ scenarios based on the WMSIC form fields, catalog data, manual review steps, and shipment preparation workflow.
The buyer shares the full part number, package requirement, quantity, destination, and available product photos so the quotation can record the exact version under review.
A multi-line BOM is organized into direct sourcing lines, lines that need package clarification, and lines where alternative-part review is permitted.
The original manufacturer part number, datasheet revision, application, critical limits, and acceptable changes are collected before possible candidates are discussed.
Sample quantity, minimum packing, package format, target date, and courier destination are kept together in one RFQ conversation.
Package photos, model markings, board context, and the quantity needed for repair help focus the sourcing review on the relevant version.
When a suffix or package note is incomplete, the response records the open difference and requests buyer confirmation before procurement proceeds.
Packing format, carton notes, invoice details, courier option, destination, and tracking handoff are coordinated around the confirmed order.
The request connects the previously used model, current demand, package evidence, target timing, and replenishment sourcing route.
Related products
Packaged components ready for RFQ.
