ISL6112 Datasheet, PDF (9/31 Pages) Intersil Corporation – Dual Slot PCI-Express Power Controller

ISL6112
Typical Application Diagram
+12V
SYSTEM
POWER _+3.3V
SUPPLY
VSTBY
0.1µF
0.1µF
PCI-EXPRESS CONNECTOR
11 26
VSTBYA VSTBYB
VAUXA
15
12VINA ₅
0.1µF
PCI
EXPRESS
BUS
VSTBY
C1
2 _CFILTERA
35 _CFILTERB
12VSENSEA ⁸
#CGS
22nF
12VGATEA ³
*R12VGATEA
15Ω
C2
#CGD
6800pF
100k 100k 100k 100k
12VOUTA ¹⁰
FORCE_ONA
FORCE_ONB
9 _{FORCE_ONA}
28
FORCE_ONB
3VINA ¹²
0.1µF
GPI_A0
GPI_B0
VSTBY
4 _{GPI_A0}
38
GPI_B0
3VSENSEA ¹³
3VGATEA ¹⁴
3VOUTA ¹⁶
*R3VGATEA
15Ω
AUXENA
AUXENB
ONA
ONB
HOT-PLUG
CONTROLLER
VSTBY
ISL6112
# C_GATE
22nF
10k x 4
12VINB ³²
45 _AUXENA
42 _AUXENB
44 _ONA
43
ONB
0.1µF
12VSENSEB ²⁹
#CGS
22nF
12VGATEB ³⁴
*R12VGATEB
15Ω
#CGD
12VOUTB ²⁷
6800pF
PWRGDA
PWRGDB
FAULTA
FAULTB
10k x 4
6
31
PWRGDA
1 ^PWRGDB
FAULTA
36 _FAULTB
0.1µF
3VINB ₂₅
3VSENSEB ²⁴
SMBUS
BASE
ADDRESS
VSTBY
41
A0
40
A1
39
A2
37 _INT
47 _SCL
48 _SDA
3VGATEB ²³
3VOUTB ²¹
VAUXB ²²
GND ¹⁷
GND ³³
GND ⁴⁶
*R3VGATEB
15Ω
#CGATE
22nF
10k x 3
SDA
SDA
3.3AUX
RSENSE^ 375mA
12V
2.1A (x4/x8)
RSENSE^
0.015Ω
3.3V
3.0A
RSENSE^
12V
2.1A (x4/x8)
RSENSE^
0.015Ω
3.3V
3.0A
3.3AUX
375mA
PCI
EXPRESS
DATA BUS
SMBUS I/O SCL
INT
SCL ^MANAGEMENT
CONTROLLER
INT
PCI-EXPRESS CONNECTOR
* 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
^ R_SENSE value is application specific
9
FN6456.0
September 28, 2007