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
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AMS1117-3.3V(品牌:TECH PUBLIC / 台舟电子,封装:SOT-223)是一款固定输出的线性低压差稳压器,输出电压为3.3V,适用于对成本、尺寸和静态噪声有一定要求的直流电源降压场合。器件支持单通道输出,输出极性为正极,工作电压常见输入场景为12V。器件集成过流保护与热关断功能,提高系统的可靠性。
线性稳压器的功耗由电压降与负载电流决定:Pd = (Vin - Vout) × Iout。
例如,Vin = 12V、Vout = 3.3V、Iout = 1A 时,Pd = (12 - 3.3) × 1 ≈ 8.7W。SOT-223 封装在此功耗下难以散热,器件会触发热关断或损伤。实际设计中建议:
器件内置过流限制与热关断,能在短路或过载时保护自身与外部负载,但不代替电路层面的保护设计。推荐在输入侧加入熔断器或限流元件,在长期高负载场景下监测温升与输出漂移,保证长期稳定工作。
若系统输入与输出电压差较小且电流不大,AMS1117-3.3V 为经济且易用的选择;若输入-输出差大且负载电流超过几百毫安,建议评估开关降压方案或改用更大散热能力的封装。购买时确认台舟电子(TECH PUBLIC)正品,核对封装、批次与规格书以保证一致性。
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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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