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)