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关于LDO并联可行否?

Other Parts Discussed in Thread: LM1117, TIDA-00270, TPS54521

如今要实现冗余电源-》5V,0.5A,现在使用LDO芯片LM2940S-5.0/NOPB并联实现,

1、6.5V经过二极管变为6.2V,经过LDO会实现5V输出,这种冗余电源实现可控电源方法可行否?

2、我将LM2940改为LM1117 5V输出是否也是同样可行?

3、在固定负载下,两片LDO芯片是否均衡输出,与VIN无关。