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LMR62014空载时候输入输出电压正常,带1A左右的电磁铁时,输出电压直接被拉低到2.7V,是怎么回事呢?



升压电路参照TI的应用电路,供电是3.7V的500MAH的锂电池,电压范围在3-4.2V,负载时5V1A的电磁铁,现在没接负载时,输入是4V,输出是5.06V,当接上负载后,输出电压直接被拉低到2.7V左右,输入电压拉低到3.7V。试着给输入加了10UF电容,输出接1000UF电容,电池并联了2节,输出还是只有2.7V,这个到底是怎么回事?请大佬们给指导指导!