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TPS62745DSSR电源转压芯片是否有低压检测功能?

用了TPS62745DSSR将9V的方块电池降压到3.3V,想知道该芯片能否进行低电压检测,需要在9V方块电池低于8V时有个变化的信号可以检测。芯片的PG引脚好像可以检测转压后的电压,如果输出小于阈值电压(2.9V)就会翻转。