Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
MSKSEMI MSZD8028IB5TR
Configuration
1 options
Configuration
26+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- MSKSEMI MSZD8028IB5TR
- Type
- MSKSEMI
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- MSKSEMI
- Electronic Component
- MSZD8028IB5TR
- Electronic Component
- 1
- Package
- SOT-23-5
- Electronic Component
- DC-DC Power Supply IC
- Electronic Component
- 1g
- Electronic Component
- 1
- Features
- Output
- Type
- Electronic Component
- Synchronous
- Electronic Component
- Electronic Component
- BM0264222714
- Operating Temperature
- 40℃~+125℃
- Operating Voltage
- 2.2V~5.5V
- Switching Frequency
- 1MHz~2MHz
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
MSZD8028IB5TR 降压型DC-DC转换器产品概述
一、产品核心定位与应用场景
MSZD8028IB5TR是美森科（MSKSEMI）推出的低静态电流降压型DC-DC转换器，专为电池供电的便携/低功耗设备设计，核心解决“小封装、长续航、灵活输出”三大需求。适配场景包括：
- 单节锂电池（2.7V~4.2V）供电的IoT终端、智能手环/手表、蓝牙音箱；
- 2节干电池（3V）供电的便携传感器、低功耗遥控器；
- 5V USB辅助供电的小型MCU模块、LED驱动电路。
二、关键性能参数详解
该器件参数针对性匹配低压电源场景，核心指标如下：
- 宽输入范围：2.2V~5.5V，覆盖单节锂电池、2节AA电池、5V USB等主流低压电源；
- 输出能力：最大连续输出电流1A，满足多数便携设备的负载功率（如蓝牙模块、小型MCU）；
- 低静态功耗：典型静态电流（Iq）仅30μA，轻载/待机时大幅减少电池损耗，延长设备续航；
- 可调输出：通过外部分压电阻可设置0.8V~VIN之间的任意电压（公式：VOUT=0.8V×(1+Rtop/Rbottom)），适配不同负载需求；
- 内置开关管：集成N沟道MOSFET，无需外置功率开关，简化BOM与PCB设计。
三、拓扑结构与设计优势
采用同步降压（Buck）拓扑，结合内置MOSFET的设计带来多重优势：
- 高效率：轻载效率≥85%，满载（1A）效率≥90%，减少发热；
- 小尺寸：SOT-23-5封装占用面积仅3mm×3mm，适合小型化设备；
- 低纹波：内置补偿电路，无需额外RC，输出纹波<50mV@1A，适配对纹波敏感的MCU、传感器；
- 宽温适应：工业级温度范围（-40℃~85℃），满足户外/ harsh环境应用。
四、封装与引脚功能
SOT-23-5表面贴装封装，引脚定义清晰：
引脚编号 名称 功能说明 1 VIN 电源输入（2.2V~5.5V） 2 GND 接地 3 FB 反馈端（外接分压电阻） 4 EN 使能端（高电平有效，悬空默认使能） 5 VOUT 电源输出（0.8V~VIN）五、典型应用与设计注意事项
5.1 典型电路（单节锂电池供电智能手环）
仅需5个外部元件：
- 输入电容：1μF陶瓷电容（VIN-GND）；
- 输出电容：2.2μF陶瓷电容（VOUT-GND）；
- 电感：10μH功率电感（VIN-VOUT）；
- 反馈电阻：Rtop=3.1kΩ、Rbottom=1kΩ（输出3.3V）。
5.2 设计要点
- 电容选择：优先用X7R/X5R材质低ESR陶瓷电容，避免电解电容（ESR高降低效率）；
- 电感要求：感值10μH~22μH，饱和电流≥1.5A（留余量）；
- 反馈电阻：用1%精度电阻，确保输出电压精度；
- EN脚处理：不使用时接VIN，关断时接GND（避免悬空误触发）。
六、总结
MSZD8028IB5TR凭借低Iq、小封装、内置开关管、可调输出的核心优势，成为电池供电便携设备的理想电源方案。兼容主流低压输入，输出覆盖多数低功耗负载，同时简化设计，适合对空间和续航有严格要求的场景。
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.
