设计使用LP2998输出电压VREF和VTT(正常均为0.675V)为DDR3L供电,目前测试该LP2998输出,VREF≈0.694V,VTT≈0.691V,均比正常值0.675V高,导致DDR3L不能正常工作,请教LP2998输出电压VREF和VTT均偏高的原因是什么?请教各位!!!
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设计使用LP2998输出电压VREF和VTT(正常均为0.675V)为DDR3L供电,目前测试该LP2998输出,VREF≈0.694V,VTT≈0.691V,均比正常值0.675V高,导致DDR3L不能正常工作,请教LP2998输出电压VREF和VTT均偏高的原因是什么?请教各位!!!