A primary application for a DPM is to measure current, voltage, and power in a power system. The 0 to 60 V input voltage range works well in circuit breaker and system health applications. In the circuit shown here, a principal ISL28025 monitors the regulated 12V to 60V line that feeds several power subsystems, and additional ISL28025 devices are used to monitor a lower regulated voltage and individual loads. Renesas power modules are also added to the circuit for high current point of load applications. The ISL28023 and the ISL28025 follow the PMBus industry standard protocol, simplifying the coding required for communication. The SMBAlert line provides quick feedback if a threshold is crossed, indicating a problem in the circuit and allowing easy identification of the problem area. A second SMBAlert line is also used to shut down the main power through analog components for an even faster response time.