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阻抗跟踪电量检测芯片的工作电压太低

Other Parts Discussed in Thread: BQ20Z45

我的主板是由一个7.4V的聚合物锂电池供电,但阻抗跟踪电量检测芯片的工作电压太低,无法直接由电池供电,如果从主板的3.3V供电,则当主板关闭时,阻抗跟踪电量检测芯片将无法工作;而如果为阻抗跟踪电量检测芯片单独增加一个LDO,又担由由于阻抗跟踪电量检测芯片的工作电流太小,导致LDO工作不稳定!

 

请问,这种情况应该怎么处理?