Model & package intelligence
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
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Technical data
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
LTL431ALT1G(乐山无线电 LRC)是一款可编程精密电压基准/可调整流稳压器,输出类型可调,参考电压约为2.5V,输出电压范围2.5V ~ 36V,适用于需要稳定基准或可调稳压的低成本应用。器件以SOT-23三引脚封装提供,体积小、便于贴片组装。
典型用法为与两只外部电阻组成分压器,实现可调输出。标准关系式:
Vout = Vref × (1 + R1/R2) + Iref × R1
其中Vref ≈ 2.5V,Iref 为参考端偏置电流(通常较小,可在精度计算中估计)。
示例:欲得到5.0V,可选R2=5 kΩ,则R1 = R2 × (Vout/Vref - 1) ≈ 5k × (5/2.5 -1) = 5kΩ。
SOT-23 三引脚封装,功能为:参考端(REF)、阴极/输出(K)、阳极/地(A)。常见引脚排列为 1-REF,2-K,3-A(不同封装厂商排列略有差异,请以厂方数据手册为准)。
品牌:LRC(乐山无线电),型号:LTL431ALT1G,封装:SOT-23。替代品可选常见TL431系列兼容器件,但在精度、温漂、最低调节电流和最大吸收电流等参数上需对比确认。购买和设计前请参阅厂方完整数据手册以获得引脚图、典型特性曲线和绝对最大额定值。
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Product sourcing intelligence
WMSIC turns product data, package visuals, BOM context, and sourcing signals into practical RFQ notes for buyers.
Model text, package form, tray or reel details, and visual evidence are reviewed together before RFQ feedback.
BOM lines are compared by package, parameters, quantity, and workable alternatives for cleaner sourcing decisions.
Stock routes, quotation confidence, lead-time notes, and shipment feasibility are checked before sales follow-up.
Buyer sourcing scenarios
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.
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