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当PIN 脚ON为H开启时，VOUT电压等于VIN电压吗
只能是接近，由于MOSFET的导通电阻（RON）的存在，会有一些小的电压降。例如，在VIN = 5V时，由于RON = 52mΩ，如果负载电流为I，那么VOUT电压将等于VIN减去I乘以RON的电压降（即VOUT = VIN - I * RON）。
