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用LM2662给7个运放供-5V的电压发现电压只有-4.3V

Other Parts Discussed in Thread: LM2662, LMR12007

数据手册上说单个LM2662可以提供200mA的电流,为了使电流更大我并联了两片2662,供电电流应该够大了,可是电压却被拉到-4.3是什么原因呢,求大家帮忙讨论讨论呀,新人求指点