ON Semiconductor Corp. (Phoenix, AZ) launched its NCP5331, a multi-phase controller with integrated gate drivers designed to support AMD Opteron™ processors. The two-phase, pulse-width modulation controller meets the power delivery specifications of the AMD Opteron™ processor, which can help eliminate the board design complications and prohibitive expense of transitioning to 64-bit computing.
The high level of integration of the NCP5331 simplifies power supply implementation while ON Semiconductor’s controller architecture provides fast transient response, thus minimizing the number of output capacitors required. The device’s loss-less inductor current sensing enables precise current sensing without expensive additional components. Output voltage is set by a five-bit digital-to-analog converter - programmable from 0.8V to 1.55V. The NCP5331 supports the requirement for voltage ID shift on the fly, allowing the processor to change the output voltage of the controller without creating any out-of-spec glitches.
Delivering a solution size that is smaller than competitive offerings, the NCP5331 is housed in a 7mm x 7mm, 32-lead, QFN package that conserves board space. It is priced at $1.97 per unit in 10,000-unit quantities. Evaluation boards are available to assist and simplify design-ins.
