ON Semiconductor (Phoenix, AZ) unveiled the CS5323 multi-phase controller with three-phase switching topology as the newest member of its controller family for VCORE power to meet the voltage regulation requirements of next-generation microprocessor platforms.
Designed with proprietary enhanced V2 control architecture, the CS5323 accurately balances the current in each phase and produces more efficient operation at lower switching frequencies (200kHz to 800kHz per phase), resulting in faster transient response, superior regulation characteristics and less stress on external gate drivers.
"Our customers have found that the CS5323 allows them to achieve faster transient response using fewer output capacitors than they can with competitive products, yet they can run at a lower switching speed enabling better efficiency with less heat generated on the motherboard," said Leslie Logan, ON Semiconductor marketing manager of the Computer Internet Business Unit.
On-board control functions include a five-bit digital-analog converter with one percent tolerance, current-sense amplifiers and 3.3V, 1mA reference with output pin. The CS5323 continuously monitors the current in each phase through the buck inductors, providing accurate, loss-less current sensing without utilizing expensive sense resistors.
ON Semiconductor offers the CS5323 in a 20-lead SO package. The suggested retail price for the CS5323 is $4.13 per unit in 10,000-unit quantities. Samples and evaluation boards are available.
