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BQ2205LY 无输出的问题,找不到问题所在

Other Parts Discussed in Thread: BQ2205LY

   一个项目上使用BQ2205LY,来给SRAM供电,基本都是按照ds上的图画的,现在VCCin 3.3V正常,电池3.3V也正常,其他CE等脚为0V,A直接接地。但是Vout无输出 0V。