The Intel® Enpirion® ED88042S device is an 8 phase, dual output, fully digital step-down controller for powering VR14 generation Xeon CPUs, and other high-performance ASICs, FPGAs, and processors. The ED88042S multi-phase controller has been designed and validated to operate with the Intel ET27xx family of monolithic common footprint (CFP) power stages, including the ET2760A and ET2760B.
The controller supports a range of phase configurations where M+N=8; M ranging from 1 to 8 and N ranging from 0 to 4 phases. The ability to operate in multiple phase configurations allows the power engineer to optimize for space, efficiency, thermal optimization, or cost. The ED88042S device comes in a compact 5mm x 5mm x 1.0 package. This highly efficient digital multi-phase controller supports two digital bus interfaces: SVID operating at 25MHz for high speed communications between the VR and CPU, and a PMBus* V1.2 interface for configuration, control, and telemetry. The device is also configurable through the PMBus interface to offer a high degree of flexibility and programmability during the engineering
This unique digital control topology reduces capacitor requirements while also minimizing frequency variation. Differential remote sensing and +/-0.5% set-point accuracy provides precise regulation over line, load and temperature variation to provide excellent static regulation to meet the Xeon CPU test suite requirements.
Designers have the option to configure the ED88042S device to suit specific applications, using the Intel Enpirion Digital Power Configurator Graphical User Interface (GUI) ecosystem. This tool has several tabs with options to program the device for settings, such as output voltage, output capacitors, start-up slew rates, and fault settings. The tool also provides real-time telemetry of input voltage, output voltage, current, and temperature.