IR3082 Datasheet, PDF (1/33 Pages) International Rectifier – XPHASE AMD OPTERON/ATHLON 64 CONTROL IC

Data Sheet No. PD94710
IR3082
XPHASE^TM AMD OPTERON^TM/ATHLON 64^TM CONTROL IC
DESCRIPTION
The IR3082 Control IC combined with an IR XPhase^TM Phase IC provides a full featured and flexible way
to implement a complete 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. With simple 5 bit voltage programming and a few external components, the IR3082
is also well suited for general purpose multiphase applications. 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.
FEATURES
• 5 bit VID with 1% overall system set point accuracy
• Programmable Dynamic VID Slew Rate
• +/-300mV Differential Remote Sense
• Programmable 150kHz to 1MHz oscillator
• Programmable VID Offset and Load Line output impedance
• Programmable Softstart
• Programmable Hiccup Over-Current Protection with Delay to prevent false triggering
• Simplified Power Good output provides indication of proper operation and avoids false triggering
• Operates from 12V input with 9.75V Under-Voltage Lockout
• 7.0V/5mA Bias Regulator provides System Reference Voltage
• Small thermally enhanced 20L MLPQ package
APPLICATION CIRCUIT
12V
ENABLE
VID0
VID1
VID2
VID3
VID4
10
0.1uF
EL
DSS/
C
20 19 18 17 16
1
2
IR3082 ^EL
AB
VID0 NE
D
G
R
WP
EL
DSS/
T
U
O
P
M
R
VID1
D
N
GL _VCC
VBIAS
15
14
3 _{VID2 CONTROL EAOUT} 13
IC ⁴ VID3
FB ¹²
5
11
VID4
VDRP
S-
NS
O
V
CS
O
R
CA
DV
SET
C
O
NII
6 7 8 9 ₁₀
CS
ROCSET
O
R
0.1uF
RVDRP
RVDAC
CVDAC
RVFB
POWER GOOD
5 Wire Analog Bus
(to PHASE ICs)
VCC SENSE
VSS SENSE
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12/17/04