DESCRIPTION

The IR3084U Control IC combined with an IR XPhaseTM Phase IC provides a full featured and flexible way to implement a complete VR10, VR11, Opteron, or Athlon64 power solution. The “Control” IC provides overall system control and interfaces with any number of “Phase” ICs which each drive and monitor a single phase of a multiphase converter. The XPhaseTM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches.

FEATURES

• 1 to X phase operation with matching Phase IC

• 7-bit VR 10/11 compatible VID with 0.5 overall system set point accuracy

• 5-bit Opteron/Athlon64 compatible VID with 1 overall system set point accuracy

• Programmable Dynamic VID Slew Rate

• +/-300mV Differential Remote Sense

• Programmable VID Offset Voltage at the Error Amplifier’s Non-Inverting Input allows Zero Offset

• Programmable 150kHz to 1MHz oscillator

• Programmable VID Offset and Load Line output impedance

• Programmable Hiccup Over-Current Protection with Delay to prevent false triggering

• Simplified VR Ready output provides indication of proper operation and avoids false triggering

• Operates from 12V input with 9.9V Under-Voltage Lockout

• 6.8V/6mA Bias Regulator provides System Reference Voltage

• Phase IC Gate Driver Bias Regulator / VRHOT Comparator

• Reduced Over-Current Detect Delay eliminates and external resistor in typical applications

• Small thermally enhanced 28L MLPQ package