Multi-Phase PWM Controller for Core-Voltage Regulation

The ISL6557 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-supply solutions available to power the latest industry-leading microprocessors. Multi-phase buckconverter 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

- 1.100V to 1.850V 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)