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Multiphase controller eyes server, storage markets

Posted: 25 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:controller multiphase? server? storage?

Primarion introduces the PX3560, a digital multiphase controller for VR11.1 core power regulation for the server and storage markets.

The PX3560 features a power state indicator (PSI) mode, which provides high efficiency at light loads with its dynamic phase dropping capability, as well as an output pin (IMON) for current monitoring, says Primarion. Unlike competing analog solutions, the PX3560, according to the company, allows the system to shed any number of phases based on the average current defined by the user to optimize the efficiency across the entire operating range. Phases dropped at lighter loads increase efficiency by several percentage points and significantly reduce the cost of energy usage over the life of the product. The controller optimizes the loop compensation based on the number of active phases to provide a stable system operation. The second generation of its proprietary active transient response (ATR2) technology enables the systems to meet stringent transient requirements, while requiring only 800?F MLCC output capacitors for VR11.1 compliance.

With up to six phases, each capable of 1MHz operation, the PX3560 can be used to build DC-DC converters, which provide up to 200A with excellent efficiency across the entire operating range. Interleaved timing of the channels results in a higher ripple frequency, minimizing input and output voltage ripple. The PX3560 incorporates an industry standard I2C compliant serial interface and on-chip non-volatile memory (NVM) for real-time system control. This allows the power supply designer to quickly optimize designs and monitor system performance. Upon startup, superior load line accuracy is achieved through internal calibration that measures and corrects current sense errors.

Already sampling with customers, Primarion's PX3560 is now available to general market. The PX3560 is available in a RoHS-compliant, 7mm x 7mm 48-lead QFN package.





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