Multi-Phase PWM Controller for Core-Voltage Regulation

The ISL6557A provides core-voltage regulation by driving up to four interleaved synchronous-rectified buck-converter channels in parallel. Intersil multi-phase controllers together with Intersil MOSFET drivers form the basis for the most reliable power-suppply solutions available to power the latest industry-leading microprocessors. Multi-phase buck converter architecture uses interleaved timing to multiply ripple frequency and reduce input and output ripple currents.

Features
• Multi-Phase Power Conversion
• Active Channel Current Balancing
• Precision rDS(ON) Current Sensing
    - Low Cost
    - Lossless
• Precision CORE Voltage Regulation
    - Differential Remote Voltage Sensing
    - ±0.8% System Accuracy
• Microprocessor Voltage Identification Input
    - Dynamic VID technology
    - 5-Bit VID Input
    - 0.800V to 1.550V in 25mV Steps
• Programmable Power-On Bias Level
• Programmable Droop Voltage
• Fast Transient Recovery Time
• Precision Enable Threshold
• Overcurrent Protection
• 2-, 3-, or 4-Phase Operation
• High Ripple Frequency. Channel Frequency Times Number Channels (100kHz to 6MHz)
• Pb-free available