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求低压差的DC/DC芯片,2A以上5V输出

Other Parts Discussed in Thread: TPS54240, TPS54340, TPS54240-Q1, LM25118

要求:输入5~24V,输出5V 2A

使用了好多芯片,问题出现在低压输入时,例如输入5V,但输出5V不稳定或根本输出不了5V(例如TPS54240,仅输出了2.3V,或输出一直在高低高低变化);

求推荐,可用的芯片,输入低压时(5~6V),输出能稳定在5V;

谢谢~~