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现在想通过一个按键开关控制一个电路的导通，有没有一个芯片，输入一个电压，按键控制其是否导通，将输入的电压给输出端
是否需要隔离？电压电流是多少？
这应该就是切换开关吧，输入多少电流，通多大电流，如TPS22913，输入5V，2A电流。
http://www.ti.com/lit/ds/symlink/tps22913b.pdf
