Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
HGSEMI LM340MP-5.0/TR LM340MP
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- HGSEMI LM340MP-5.0 / TR
- Type
- HGSEMI
- Minimum package
- 2500 编带
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- HGSEMI
- Electronic Component
- 40uV
- Electronic Component
- LM340MP-5.0/TR
- Electronic Component
- 1
- Package
- SOT-223
- Electronic Component
- Linear Regulator(LDO)
- Electronic Component
- 0.25g
- Electronic Component
- 1
- Electronic Component
- BM0229355072
- Operating Temperature
- 40℃~+85℃@(Ta)
- Operating Voltage
- 35V
- Output
- Electronic Component
- Output Voltage
- 5V
- 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.
LM340MP-5.0/TR 产品概述
一、产品简介
LM340MP-5.0/TR（品牌：HGSEMI/华冠）是一款三端固定正稳压线性稳压器，输出电压为5.0V，最大输出电流1A，封装为SOT-223。器件内置短路电流限制与过热保护，适用于工控、通信及一般电子设备的稳压电源设计。工作环境温度范围为-40℃至+85℃（Ta），工作电压最高可达35V，噪声低至40µV，电源纹波抑制比（PSRR）在120Hz时达到62dB，能有效抑制输入纹波与干扰。
二、主要特性
- 输出类型：固定5.0V正极输出，输出通道数：1
- 输出电流：典型1A输出能力（受散热条件限制）
- 保护功能：内置短路保护与过热关断，自动恢复机制提高系统可靠性
- 电气性能：PSRR 62dB @ 120Hz，低噪声：40µV，有利于对噪声敏感的模拟电路
- 工作电压与温度：输入最高可至35V；工作温度范围 -40℃ ~ +85℃（Ta）
- 封装：SOT-223，便于表面贴装与散热设计
三、电气与应用注意事项
- 电容建议：为保证稳定与瞬态响应，建议输入端靠近器件放置0.33µF陶瓷或多层电容，输出端并联0.1µF陶瓷和1~10µF低ESR电解/固态电容。实际选值可根据负载瞬态需求与PCB寄生调整。
- 稳定性：经典三端稳压器对输出电容与ESR有一定依赖，建议参照应用手册进行实验验证以确保不会振荡。
- 功率耗散：线性稳压器的功耗 = (Vin - Vout) × Iout。例如在Vin=12V、Vout=5V、Iout=1A时，器件需耗散约7W热量，SOT-223在无额外散热时难以承受，应通过PCB铜箔扩散或散热器降低结-环境温升。
- 热设计：在SOT-223封装上应扩大接地/电源铜箔面积，必要时加焊盘或散热片以降低结温，避免热关断影响供电稳定性。
四、典型应用场景
- 工业控制与嵌入式系统的5V供电模块
- 通信设备、仪器仪表的逻辑电源稳定化
- 电源板、模块化电源中的线性后级滤波与稳压
- 对噪声抑制有要求的模拟前端、传感器供电（利用其低噪声与高PSRR优势）
五、封装与引脚
- 封装类型：SOT-223，三引脚结构（输入、地、输出），便于直插或表贴焊接。
- PCB布局建议：输入电容靠近输入引脚，输出电容靠近输出引脚，地线短而粗；为提高散热在地或输出焊盘处增加铜面积并与底层铜箔通孔连接。
六、选型与替代考虑
选择LM340MP-5.0/TR时应注意输出电流与热耗散匹配；若系统存在较大压差或长时间高电流工作，应考虑增加散热或选用降压转换器以降低功耗。若需要更低噪声或更高PSRR/更低压差的方案，可考虑低压差LDO替代器件；若需更高电流或更强散热能力，可选用TO-220等大封装线性稳压器。
总结：LM340MP-5.0/TR为一款结构简单、保护完善且噪声低、PSRR优良的固定5V线性稳压器，适用于要求稳定、低噪声的1A级电源场景。设计时重点关注输入电压－输出电压差带来的功耗与散热管理，以及输出旁路与布局以保证整体稳定性与性能。
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.
