请教TI的技术支持：
单片机管脚上有这样一个引脚DCDC_SW，参照TI的测试板相关电路如下，
我的板子将L1（我焊接的是磁珠）拿掉才能正常使用，此时L1左端（DCDC_SW）端电压为1.2V，右端为1.67V左右。将L1焊接上去反而不正常，此时L1两端电压为1.5V左右，连程序都下不进去。我的整个板子供电电压为3V。为什么会出现这种现象呢
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