ISL6327A В® Data Sheet February 17, 2009 FN6833.0 Enhanced 6-Phase PWM Controller with
8-Bit VID Code and Differential Inductor
DCR or Resistor Current Sensing Features The ISL6327A 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. Precision Multiphase Core Voltage Regulation
-Differential Remote Voltage Sensing
-В±0.5% System Accuracy Over Life, Load, Line and
Temperature
-Adjustable Precision Reference-Voltage Offset Microprocessor loads can generate load transients with
extremely fast edge rates. The ISL6327A utilizes Intersil’s
proprietary Active Pulse Positioning (APP) and Adaptive
Phase Alignment (APA) modulation scheme to achieve the
extremely fast transient response with fewer output
capacitors.
Today’s microprocessors require a tightly regulated output
voltage position versus load current (droop). The ISL6327A
senses the output current continuously by utilizing patented
techniques to measure the voltage across the dedicated
current sense resistor or the DCR of the output inductor. …