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TPS56121: 输入静态电流为60mA

Part Number: TPS56121

Hi 专家好

请教一下,我用tps56121输入电压12V输出电压7V,当输出电流为0的时候输入电流为60mA,当将EN/SS管脚拉低输入电流为0,当拿掉功率电感输入电流依然是60mA,请问这个问题应该从什么地方分析?

多谢。