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IR3084UM-IR3084UMPBF
XPhase Control IC VR10 VR11 and Opteron/Athlon64 Control IC
Internotiehol IR3084U
152R Rectifier
XPHASET'VI VR10, VR11 & OPTERON/ATHLON64 CONTROL IC
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.
The IR3084U is based on the IR3084 VR10 Control IC, but incorporates the following modifications;
q Supports VR11 7-bit VID, VR10 7-bit extended VID, and Opteron/Athlon64 5-bit VID codes
q Supports both VR11 and legacy Opteron/Athlon64 start-up sequences
q VID Select pin sets the DAC to VR10, VR11, or Opteron/Athlon64
o |NTL_MD output pin indicates which DAC is selected - Intel or AMD
q l/Oils- float detection protects the CPU in the event that the l/OS) trace is broken
q Enable Input Thresholds set by VID Select pin to either VR10, VR11 or Opteron/Athlon64
q VID Input Thresholds set by VID Select pin to either 0.6V (VR10/VR11) or 1.24V (AMD)
q No-Load Setpoint Current changes polarity based on VID Select to accommodate VR10, VR11
(negative offset from DAC) or Opteron/Athlon64 (positive offset from DAC).
FEATURES
q 1 to X phase operation with matching Phase IC
q 7-bit VR 10/11 compatible VID with 0.5% overall system set point accuracy
q 5-bit Opteron/Athlon64 compatible VID with 1% overall system set point accuracy
q Programmable Dynamic VID Slew Rate
q +/-300mV Differential Remote Sense
q Programmable VID Offset Voltage at the Error Amplitier's Non-Inverting Input allows Zero Offset
q Programmable 150kHz to 1MHz oscillator
q Programmable VID Offset and Load Line output impedance
q Programmable Hiccup Over-Current Protection with Delay to prevent false triggering
q Simplified VR Ready output provides indication of proper operation and avoids false triggering
o Operates from 12V input with 9.9V Under-Voltage Lockout
o 6.8V/6mA Bias Regulator provides System Reference Voltage
q Phase IC Gate Driver Bias Regulator / VRHOT Comparator
q Reduced Over-Current Detect Delay eliminates and external resistor in typical applications
q Small thermally enhanced 28L MLPQ package
Page 1 of 47 June 1, 2009
International
. . IR3084U
152R Rectifier
TYPICAL APPLICATION CIRCUIT
I I 5 ov 2r
RT R117 + '
4.7K, B=4450 LZIK RCP CCP A R1331 Q4
2.49K 56nF VREG_12CFILTERED 1 CJD200
R137 >>VGDFIIVE
18 U5 CI35
VUC_SENSE 17 27
FE EAOUT VRRDY 15 --
__01009 348 HDHPI “Miggg 20
vss SENSE InF 750
- RDRP
750 CI34 -- C89
0.1uF 100pF
IR3084UMTH - -
Q5 REGDRV 24
16 VDRP REGFB 23
REGSET 25
OUTEN ENABLE
VID0 g woo |NTL_MD 2 §¥§£RV %‘EDRV
VID1 VIDI _
mg; VID
VlD4 , VID4 Q6 7 7
vms 3 v.05 - _
woe l vms RVSETPT1
WILSE VIDSEL 124
VSETPT _
VREG_1CFILTERED HVSETPT
l' 21 VCC l a 124
R30 OCSET
m c130 26 HOCSET
0.1m: SS/DEL 12 12.7K
CSS/DEL VDAC yy VDAC
=- 0.1uF RVDAC
VOSNS- LGND ROSC ll 3.5 tzf,i,v3"
- nosc -
= 1o 22 30AK
Page 2 of 47 June 1, 2009
