Optimized Multi-Phase PWM Controller with 6-Bit DAC and Programmable Internal Temperature Compensation for VR10.X Application

The ISL6556B controls microprocessor core voltage regulation by driving up to 4 synchronous-rectified buck channels in parallel. Multi-phase buck converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple currents.

Features
• Precision Multi-Phase Core Voltage Regulation
    - Differential Remote Voltage Sensing
    - ±0.5% System Accuracy Over Temperature and Life
    - Adjustable Reference-Voltage Offset
• Precision rDS(ON) Current Sensing
    - Integrated Programmable Temperature Compensation
    - Accurate Load-Line Programming
    - Accurate Channel-Current Balancing
    - Low-Cost, Lossless Current Sensing
• Internal Shunt Regulator for 5V or 12V Biasing
• Microprocessor Voltage Identification Input
    - Dynamic VID™ Technology
    - 6-Bit VID Input
    - 0.8375V to 1.600V in 12.5mV Steps
• Threshold Enable Function for Precision Sequencing
• Overcurrent Protection
• Overvoltage Protection
    - No Additional External Components Needed
    - OVP Pin to drive optional Crowbar Device
• 2, 3, or 4 Phase Operation up to 1.5MHz per Phase
• QFN Package Option
    - QFN Compliant to JEDEC PUB95 MO-220 QFN - Quad
        Flat No Leads - Product Outline
    - QFN Near Chip Scale Package Footprint; Improves
        PCB Efficiency, Thinner in Profile
• Pb-free Available (RoHS Compliant)