IR3084U Datasheet | International Rectifier

DESCRIPTION The IR3084U Control IC bined with an IR XPhase TM Phase IC provides a full featured and flexible way to implement a plete 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 XPhase TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. The IR3084U is based on the IR3084 VR10 Control IC, but incorporates the following modifications; - - - - - - - - Supports VR11 7-bit VID, VR10 7-bit extended VID, and Opteron/Athlon64 5-bit VID codes Supports both VR11 and legacy Opteron/Athlon64 start-up sequences VID Select pin sets the DAC to VR10, VR11, or Opteron/Athlon64 INTL_MD output pin indicates which DAC is selected - Intel or AMD VOSENS- float detection protects the CPU in the event that the VOSENS- trace is broken Enable Input Thresholds set by VID Select pin to either VR10, VR11 or Opteron/Athlon64 VID Input Thresholds set by VID Select pin to either 0.6V (VR10/VR11) or 1.24V (AMD) No-Load Setpoint Current changes polarity based on VID Select to acmodate VR10, VR11 (negative offset from DAC) or Opteron/Athlon64 (positive offset from DAC). Data Sheet No. PD94719 VR10, VR11 & OPTERON/ATHLON64 CONTROL IC FEATURES .. - - - - - - - - - - - - - - - 1 to X phase operation with matching Phase IC 7-bit VR 10/11 patible VID with 0.5% overall system set point accuracy 5-bit Opteron/Athlon64 patible VID with 1% overall system set point accuracy Programmable Dynamic VID Slew Rate +/-300m V Differential Remote Sense Programmable VID Offset Voltage at the Error Amplifier’s Non-Inverting Input allows Zero Offset Programmable 150k Hz to 1MHz oscillator Programmable VID Offset and Load Line output impedance Programmable Hiccup Over-Current Protection with Delay to prevent false triggering Simplified VR...