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LMR23625静态功耗几十毫安

Other Parts Discussed in Thread: LMR23625

使用的芯片是LMR23625,SO8封装的,具体电路如下图。

输入为开关电源提供的12V,输出为6V,在空载情况下,开关电源的输入电流达到35mA。测试了SW,确实为2.1MHz,并且占空比为50%,另外测量了FB的电压值,为1.0V,也是正确的,输出电压的纹波也不大,基本在50mV以内。

焊接了两块PCB都是同样的状态,为什么静态功耗这么大,都有35mA了?