Chipset provides full-featured, flexible approach to implementing complete AMD CPU power solution

This new XPhase chipset, co-designed with the latest generation of IR’s DirectFET MOSFETs, offers a power supply that is smaller and easier to design while providing higher efficiency and a lower overall system cost than conventional approaches, delivering a full-featured and flexible approach to implementing a complete CPU power solution.

Housed in a 25 percent smaller package than a traditional six-phase control IC, the IR3514’s six-wire communication bus simplifies routing, and, by reducing the number of external discrete components required, significantly reduces board space. The IR3514 interfaces with any number of phase ICs each driving and monitoring a single phase. The IR3514 provides independent control of both the VDD core and VDDNB auxiliary planes required by next-generation AMD CPUs when operated in SVI mode.

When operated in PVI mode, the IR3514 controls the VDD core plane through six parallel VID input bits while the VDDNB plane power stage is kept at high impedance. An overall system set point accuracy of 0.5 percent is achieved. Other features include programmable dynamic VID slew rates, programmable VID Offset (VDD output only) and programmable output impedance (VDD output only).