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.
LM431AIM3X/NOPB 是德州仪器(TI)推出的一款可调并联型(分流)电压基准/稳压芯片,采用 SOT-23-3 小封装,适合空间受限的高精度参考与简单线性稳压场景。器件工作温度范围为 -40℃ 至 +85℃(Ta),具有较低的温漂和较大的分流能力,适用于精密模拟电路与电源管理应用。
LM431A 是一款可调节的精密分流参考源,通过外接两个电阻构成分压网络来设定输出电压。常用公式为: Vout ≈ Vref × (1 + R2/R1)(在 Iadj 可忽略时),其中 Vref 约为 2.44V。器件通过吸收分流电流保持节点电压稳定,可用作单端参考、精密比较器的参考端或作为简单线性稳压元件。
SOT-23-3 封装便于表面贴装,但热阻相对较高。作为分流器件使用时,芯片会消耗由源电压与输出电压差产生的功率。设计时需计算芯片耗散 Pd ≈ (Vin − Vout) × Isink,确保在最大分流电流(100 mA)和工作电压下不超过封装允许的功耗限制,并采取合适的PCB散热与走线策略以避免过热。
LM431AIM3X/NOPB 提供工业温度范围内的可调、低漂移基准与高达 100 mA 的分流能力,适合成本敏感且空间受限的精密参考与简单稳压场合。通过合理的外围电阻设计与热管理,可在多种电源与测量应用中实现稳定可靠的性能。欲获得更详细的极限参数与典型特性曲线,请参阅 TI 官方数据手册。
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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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