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GR(国睿)78L12是一款专为小功率固定电压供电设计的线性稳压器,属于78L系列(后缀“12”对应固定输出12V)。该器件采用单通道正极性输出,核心定位为小电流、低纹波、高可靠性的电源转换方案,适用于对体积、纹波抑制有明确要求的各类电子电路,无需额外调节即可实现稳定输出。
器件PSRR为60dB@120Hz,直接反映对输入纹波的抑制能力:
GR78L12内置三大保护机制,从电流、短路、温度维度提升电路可靠性:
当输出电流超过额定150mA时,器件自动限制电流至安全范围,避免负载过流导致的器件发热或损坏,同时保护后端负载。
若输出端发生短路(如负载短路、接线错误),器件会切断/限制输出电流,防止短路电流过大烧毁内部电路;短路故障排除后,可自动恢复正常工作。
当结温(Tj)超过125℃时,热关断功能启动,暂时关闭输出;待温度下降至安全阈值后,自动恢复输出,避免过热导致的永久性损坏。
采用SOT-89贴片封装,体积小巧(约2.9mm×2.5mm),适合高密度PCB设计,支持自动贴装,降低生产难度。
结合参数特性,该器件适用于以下场景:
GR78L12的结温工作范围为0℃~+125℃,覆盖工业级(0℃~85℃)及部分汽车级温度需求,可在高温环境(如设备内部散热有限)下稳定工作。
多重保护功能+宽温设计,使器件在恶劣环境下故障率显著降低,适合对可靠性要求较高的场景。
GR(国睿)78L12作为小功率固定正输出线性稳压器,凭借固定12V输出、150mA电流、60dB纹波抑制、多重保护及SOT-89封装等特性,成为小功率电源设计的实用选择,尤其适合对体积、纹波和可靠性有要求的电子电路。
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