MAX20751 PMBus Multiphase Master IC Analog Devices MAX20751 PMBus™ Multiphase Master IC can drive up to four smart-slave integrated power devices. Utilizing Maxim's smart-slave ICs, the device provides a high-density and flexible solution tailored to various power loads used in communication equipment. Proprietary-coupled inductors recommended that reducing the effective inductor value without excessive ripple current results in improved transient response and reduced output capacitors required.