ISL6307A

DATASHEET ISL6307A Ultra-high bandwidth 6-Phase PWM Controller with 8 Bit VID Code Capable of Precision RDS(ON) or DCR Differential Current Sensing FN9236 Rev 0.00 February 6, 2006 The ISL6307A controls microprocessor core voltage regulation by driving up to 6 synchronous-rectified buck channels in parallel. Multiphase buck converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple currents. Lower ripple results in fewer components, lower component cost, reduced power dissipation, and smaller implementation area. Microprocessor loads can generate load transients with extremely fast edge rates. The ISL6307A features a high bandwidth control loop and ripple frequencies up to 12MHz to provide optimal response to the transients. The ISL6307A senses current by utilizing patented techniques to measure the voltage across the on resistance, RDS(ON), of the lower MOSFETs or DCR, of the output inductor during the lower MOSFET conduct...