MIC2592B Datasheet, PDF (2/31 Pages) Micrel Semiconductor – Dual-Slot PCI Express Hot-Plug Controller

MIC2592B
Typical Application
Micrel
System ^+12V
Power _+3.3V
Supply
VSTBY
0.1µF
0.1µF
PCI Express Connector
V_STBY
C1
100k 100k 100k 100k
/FORCE_ONA
/FORCE_ONB
GPI_A0
GPI_B0
V_STBY
AUXENA
AUXENB
ONA
ONB
Hot-Plug
Controller
/PWRGDA
/PWRGDB
/FAULTA
/FAULTB
V_STBY
SMBus
Base
Address
V_STBY
10k x 3
SDA
SMBus I/O SCL
/INT
11
26
VSTBYA VSTBYB
VAUXA ¹⁵
0.1F
110k
1%
20 _RFILTER[A&B]
2 _CFILTERA
35 _CFILTERB
C2
12VINA ₅
12VSENSEA ⁸
#_CGS
22nF
12VGATEA ³
#_CMILLER
6800pF
12VOUTA ¹⁰
*R_12VGATEA
15
9 _{/FORCE_ONA}
28
/FORCE_ONB
3VINA ¹²
0.1F
4 _{GPI_A0}
38 _{GPI_B0}
3VSENSEA ¹³
3VGATEA ¹⁴
MIC2592B
3VOUTA
16
#_CGATE
22nF
*R_3VGATEA
15
10k x 4
45 _AUXENA
42 _AUXENB
44 _ONA
43 _ONB
12VINB ³²
12VSENSEB ²⁹
12VGATEB ³⁴
12VOUTB ²⁷
0.1F
#_CGS
22nF
*R_12VGATEB
15
#_CMILLER
6800pF
10k x 4
6 _/PWRGDA
31 _/PWRGDB
1 _/FAULTA
36 _/FAULTB
3VINB
25
3VSENSEB ²⁴
0.1F
41 _A0
40 _A1
39 _A2
37 _/INT
47 _SCL
48 _SDA
3VGATEB ²³
3VOUTB ²¹
VAUXB ²²
GND ¹⁷
GND ³³
GND ⁴⁶
*R_3VGATEB
15
#_CGATE
22nF
R_SENSE
0.020
PCI
Express
Bus
3.3AUX
375mA
Si4435DY
R_SENSE
0.013
12V
2.1A (x4/x8)
Si4420DY
3.3V
3.0A
R_SENSE
0.020
Si4435DY
12V
2.1A (x4/x8)
R_SENSE
0.013
Si4420DY
3.3V
3.0A
3.3AUX
375mA
PCI
Express
Bus
SDA
SCL
/INT
Management
Controller
PCI Express Connector
* Values for R_12VGATE[A/B] and R_3VGATE[A/B] may vary
depending upon the CGS of the external MOSFETs.
# _{These components are not required for MIC2592B}
operation but can be implemented for GATE output
slew rate control (application specific)
Â¥ Bold lines indicate high current paths
March 2005
2
M9999-033105