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1-1.什么是负载开关IC？
负载开关IC是以串联方式插入电源与负载电路或IC之间的一个半导体开关。负载开关IC的使用简化了以下工作：1）为每个系统模块供电；2）IC的供电时序；3）可防止系统故障的电路保护。
以锂离子或其它类型电池供电的移动设备和节能设备为例。这类电子系统仅通过启用基本电路块，并关闭所有其它电路块来节能。
负载开关IC是具有内部开关的电源管理 IC。由于导通电阻和静态电流都很低，因此负载开关IC表现出最小的压降和功耗。负载开关IC集成了各种保护功能，与由分立器件组成的负载开关电路相比，负载开关IC所需的元器件更少。因此，负载开关IC有助于提高电子系统的稳定性并缩小其尺寸。
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