Multiple LTC2974’s can be easily cascaded in a system to manage more than four rails, and the LTC2974 works just as well with the rest of Analog Devices Digital Power family. Shown here are 16 power supplies digitally managed by four different types of Digital Power devices, where all of the devices work in sequence together to manage the complete power system. At the top, the LTC2978 digital power supply manager, an 8-rail voltage-only version of the LTC2974, is managing eight DC/DC converters. Similarly, in the middle, the LTC2974 is managing four DC/DC converters. Towards the bottom, two LTC3880 dual regulators with built-in Digital Power capabilities are outputting two single phase and one dual phase rails. Last but not least, the LTC3883 at the bottom is a single version of the LTC3880 and is providing the sixteenth regulated output. All Digital Power devices in the system communicate over I²C with the system host. All Digital Power devices can also share a single fault sharing line, not shown here, making it simple to create fault dependencies between any channels or combinations of channels. All of this hardware is managed by the LTpowerPlay™ GUI software using a DC1613 USB to PMBus controller, providing the designer with complete control over the power system all the time, whether one is designing locally, debugging in circuit, or troubleshooting remotely.