ISL6112
2
FN6456.1
August 25, 2011
Typical Application Diagram
SYSTEM
POWER
SUPPLY
PCI-EXPRESS CONNECTOR
+12V
+3.3V
VSTBY
VSTBYB
VSTBYA
VAUXA
12VINA
12VSENSEA
3VINA
3VSENSEA
12VINB
12VSENSEB
3VINB
3VSENSEB
12VGATEA
12VOUTA
3VGATEA
3VOUTA
3VGATEB
3VOUTB
VAUXB
GND
GND
A1
A2
A0
ONB
ONA
GPI_B0
GPI_A0
FORCE_ON
B
FORCE_ON
A
AUXENB
AUXENA
INT
SCL
SDA
12VGATEB
12VOUTB
CFILTERA
CFILTERB
ISL6112
#CGS
22nF
*R12VGATEA
15?/SPAN>
#
C
GATE
22nF
#CGD
6800pF
15?/SPAN>
RSENSE^
PCI
EXPRESS
BUS
3.3AUX
375mA
3.3V
3.0A
12V
2.1A (x4/x8)
RSENSE^
#CGS
22nF
*R12VGATEB
15?/SPAN>
#
CGD
6800pF
RSENSE^
0.015?/SPAN>
#CGATE
22nF
*R3VGATEB
RSENSE^
0.015?/SPAN>
PCI-EXPRESS CONNECTOR
PCI
EXPRESS
DATA BUS
3.3AUX
375mA
3.3V
3.0A
12V
2.1A (x4/x8)
* Values for R
12VGATE
and R
3VGATE
 may vary
  depending upon the C
GS
of the external MOSFETs.
 
# These components are not required for ISL6112
  operation but can be implemented for GATE output
  slew rate control (application specific).
" Bold lines indicate high current paths.
4
9
2
11  26
5
8
3
10
12
13
14
16
32
29
34
27
25
24
23
21
22
17
GND
33
46
15
15?/SPAN>
*R3VGATEA
0.1礔
0.1礔
0.1礔
0.1礔
0.1礔
0.1礔
FAULT
B
FAULT
A
PWRGD
B
PWRGD
A
1
ONB
ONA
AUXENB
AUXENA
INT
SCL
SDA
HOT-PLUG
CONTROLLER
SMBUS I/O
MANAGEMENT
CONTROLLER
48
47
37
43
42
38
28
35
 45
44
V
STBY
C1
 C2
VSTBY
10k x 3
10k x 4
SDA
SCL
INT
SMBUS
BASE
ADDRESS
39
40
41
GPI_B0
100k
100k
100k
100k
GPI_A0
V
STBY
FORCE_ON
B
FORCE_ON
A
FAULTB
FAULTA
PWRGDB
PWRGDA
36
31
 6
V
STBY
10k x 4
^ R
SENSE
 value is application specific.
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