A serial bus network, comprising: a voltage regulator configured to provide power to a plurality of serial buses, having a common predetermined operational voltage range; wherein each of the serial buses is configured to provide power from the voltage regulator to a device coupled to the serial bus and to serially transfer data between devices coupled to the serial bus; a plurality of power switches, each configured to switch power from the voltage regulator to one of the serial buses, each of the power switches comprising: a switch input terminal coupled to an output of the voltage regulator; and a switch output terminal coupled to one of the serial buses, and; a voltage monitor coupled to the voltage regulator and coupled to the output terminal of each of the power switches; wherein the voltage monitor is configured to: compare bus voltages at the output terminals of the power switches; identify a lowest of the bus voltages via the comparison; compare the identified lowest of the bus voltages to the output voltage of the voltage regulator; only if the difference between the identified lowest of the bus voltages and the output voltage of the voltage regulator is less than a predetermined maximum difference amount, adjust the output voltage of the voltage regulator such that the identified lowest of the bus voltages is within the predetermined operational voltage range, wherein each of the power switches comprises a voltage control loop configured to reduce the bus voltage at the output terminal of the power switch based on the output voltage of the voltage regulator causing the voltage at the output terminal to exceed an upper limit of the predetermined operational voltage range.. a voltage regulator configured to provide power to a plurality of serial buses, having a common predetermined operational voltage range; wherein each of the serial buses is configured to provide power from the voltage regulator to a device coupled to the serial bus and to serially transfer data between devices coupled to the serial bus; a plurality of power switches, each configured to switch power from the voltage regulator to one of the serial buses, each of the power switches comprising: a switch input terminal coupled to an output of the voltage regulator; and a switch output terminal coupled to one of the serial buses, and; a switch input terminal coupled to an output of the voltage regulator; and a switch output terminal coupled to one of the serial buses, and; a voltage monitor coupled to the voltage regulator and coupled to the output terminal of each of the power switches; wherein the voltage monitor is configured to: compare bus voltages at the output terminals of the power switches; identify a lowest of the bus voltages via the comparison; compare the identified lowest of the bus voltages to the output voltage of the voltage regulator; only if the difference between the identified lowest of the bus voltages and the output voltage of the voltage regulator is less than a predetermined maximum difference amount, adjust the output voltage of the voltage regulator such that the identified lowest of the bus voltages is within the predetermined operational voltage range, compare bus voltages at the output terminals of the power switches; identify a lowest of the bus voltages via the comparison; compare the identified lowest of the bus voltages to the output voltage of the voltage regulator; only if the difference between the identified lowest of the bus voltages and the output voltage of the voltage regulator is less than a predetermined maximum difference amount, adjust the output voltage of the voltage regulator such that the identified lowest of the bus voltages is within the predetermined operational voltage range, wherein each of the power switches comprises a voltage control loop configured to reduce the bus voltage at the output terminal of the power switch based on the output voltage of the voltage regulator causing the voltage at the output terminal to exceed an upper limit of the predetermined operational voltage range..