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需要芯片能稳定输出5v，输出电流为500mA，并且该芯片带有使能端，能够用控制器输出的PWM波来控制电源芯片是否工作。同时希望电路简单
可以考虑TPS561208
Hi
可借助在线仿真webench选型： http://www.ti.com.cn/
