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IR3082 Datasheet

  • IR3082

  • XPHASE AMD OPTERON/ATHLON 64 CONTROL IC

  • 33頁

  • IRF

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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 鈥淐ontrol鈥?IC provides overall system
control and interfaces with any number of 鈥淧hase ICs鈥?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
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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
POWER GOOD
12V
10
0.1uF
ENABLE
0
2
E
L
B
A
VID0
N
E
L
E
D
/
S
S
C
9
1
D
G
R
W
P
8
1
L
E
D
/
S
S
7
1
T
U
O
P
M
R
6
1
D
N
G
L
VID0
VID1
1
2
3
4
5
VCC
VBIAS
EAOUT
FB
VDRP
15
14
13
12
11
0.1uF
VID1
VID2
VID3
VID4
-
S
N
S
O
V
6
VID2
VID3
VID4
IR3082
CONTROL
IC
C
S
O
R
7
5 Wire Analog Bus
(to PHASE ICs)
C
A
D
V
8
T
E
S
C
O
9
N
I
I
0
1
ROCSET
RVDRP
C
S
O
R
RVDAC
RVFB
VCC SENSE
CVDAC
VSS SENSE
Page 1 of 1
12/17/04

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