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.
LM7905CT(华冠 HGSEMI 封装 TO-220-3)是一款固定负输出线性稳压器,输出电压为 -5V,面向需要稳定负电源的模拟与混合信号系统。该器件设计用于单通道输出,具备较低静态电流和中等功率输出能力,适合驱动运放、比较器、低频模拟电路及小功率数字电路的负电源需求。
TO-220-3 封装常用于需要良好散热管理的线性稳压器。典型引脚排列(正面朝向观察,从左到右):
选择 LM7905CT 时,应结合系统的最大负载电流、输入电压范围、允许的压降和散热条件。若系统要求更低压差或更高效率,可考虑低压差线性稳压(LDO)或开关型负电源方案;若对纹波抑制要求更高,可配合后级滤波或更高 PSRR 的器件。
总结:LM7905CT 以其简单的外形、稳定的 -5V 输出和良好的纹波抑制,适合多数中低功率负电源应用。合理的旁路电容与散热设计能显著提升系统稳定性与使用寿命。
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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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