ir3084u International Rectifier Corp., ir3084u Datasheet - Page 21

• Manufacturer Part Number: ir3084u
• Description: Xphasetm Vr10, Vr11 & Opteron/athlon64 Control Ic
• Manufacturer: International Rectifier Corp.

+12Vin
ENABLE
(VTT)
VDAC
SS/DEL
EAOOUT
IIN
VOUT
VRRDY
+12Vin
ENABLE
(VTT)
VDAC
SS/DEL
EAOOUT
IIN
VOUT
VRRDY
Page 21 of 47
(ENABLE ENDS
(ENABLE ENDS
FAULT MODE)
FAULT MODE)
1.100V
VID SETTING
START
START
3.85V
3.77V
3.10V
1.30V
3.77V
1.30V
0.85V
0.85V
Figure 10b – Opteron/Athlon64 Start-up Waveforms (VID Setting=1.1V)
Figure 10a – Start-up Waveforms with Boot Mode (VID Setting > 1.1V)
START DELAY
1.8ms
START DELAY
1.8ms (TD1)
VID SETTING
1.100V
SOFT START TIME
1.6ms (TD2)
SOFT START TIME
1.8ms
VID SETTING
1.100V
VID
SAMPLE
DELAY
1.0ms
(TD3)
DYNAMIC VID TIME
200us (TD4)
VR_RDY DELAY
2.3ms
VR_RDY DELAY
1.3ms (TD4+TD5)
NORMAL
OPERATION
NORMAL
OPERATION
IR3084U
(VCC UVL
INITIATES
FAULT MODE)
(VCC UVL
INITIATES
FAULT MODE)
POWER-DOWN
POWER-DOWN
9/14/2005
9.1V
UVLO
9.1V
UVLO
VDAC