低消耗电流线路交换 CXES4277系列是一款内置P沟道MOSFET，自带ON/OFF功能和输出电流保护功能的低消耗电流线路交换。它能够控制供电电路的时序，并带有CL放电电路，因此在使用多个电源的应用中，能最大限度地有效合理地分配电源，大大提高了电池的使用时间，延长使用寿命

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    CXES4277系列是一款内置P沟道MOSFET，自带ON/OFF功能和输出电流保护功能的低消耗电流线路交换。它能够控制供电电路的时序，并带有CL放电电路，因此在使用多个电源的应用中，能最大限度地有效合理地分配电源，大大提高了电池的使用时间，延长使用寿命。采用USP-4封装，并且不需要电容等外部元件，有助于实现电源电路的小型化，大大节省了空间。CE端输入低电压时，芯片处于节电模式，如果此时输出端接有电容，在节电模式下，内部开关导通，能实现电容高速放电，使VOUT端电压快速回归到VSS程度。内置Foldback型过电流保护电路，能在输出端出现过电流和短路时提供保护。The CXES4277 series is a low supply current load switch IC with ON/OFF control and output current protection which integrates P-channel MOSFET. The CXES4277 is suited for power distribution switch. With connecting to the output pin of step-down DC/DC converters, the CE pin controls ON/OFF for each distribution switch to deliver power per requirements and maximize total power efficiency. As result, the CXES4277 helps extend battery life and product operation time. The CXES4277 is available in an ultra small package USP-4 and does not require any external capacitors so that it can provide small power unit design and board space saving. When low signal is input to the CE pin, the CXES4277 enters stand-by mode. Even where a load capacitor is connected to the output pin during in the stand-by mode, the internal switch between the VOUT and VSS of the CXES4277 enables the electric charge in the load capacitor to be discharged. Because of this discharge function, the VOUT pin voltage falls quickly to VSS level. The CXES4277 contains an over current protection with foldback current circuitry which operates as over current protection and short circuit protection for the output pin.R8S嘉泰姆

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