Datasheet

MAX5946
Dual PCI Express, Hot-Plug
Controller
14 ______________________________________________________________________________________
5µA
12SA-
12GA
12SA+
54mV 500mV
R
SENSE12A
-
+
150µA
-
+
50µA
3.3SA-
3.3GA
3.3SA+
20mV 100mV
CONTROL LOGIC
AUX-SLOT A
INPUT COMPARATORS AND CHIP-CONTROL LOGIC
CONTROL LOGIC
MAIN-SLOT A
CHARGE
PUMP
t
FAULT
OSCILLATOR
t
POR
OSCILLATOR
R
SENSE3.3A
-
+
150µA
-
+
10µA
100mA
10µA
VREF
CHARGE
PUMP
-
+
150mA
BIAS
REFERENCES AND UVLO
5µA
12SB-
12GB
12SB+
54mV
500mV
R
SENSE12B
R
TIM
R
PORADJ
150µA
5µA
3.3SB-
3.3GB
3.3VAUXOB3.3VAUXOA
3.3VAUXIN
ONA
PGND GND
AUXONA FONA PRES-DETA ONB AUXONB FONB PRES-DETB
3.3SB+
20mV
100mV
CONTROL LOGIC
AUX-SLOT B
CONTROL LOGIC
MAIN-SLOT B
CHARGE
PUMP
DEBOUNCE
FAST
OSCILLATOR
150µA
VREF
CHARGE
PUMP
R
SENSE3.3B
10µA
100µA
10µA
150µA
-
+
-
+
-
+
-
+
-
+
PWRGDA FAULTA FAULTBTIM
INPUT1
OUTPUT1
INPUT2
OUTPUT2
12VIN
PORADJ PWRGDB
10µA
100mA
10µA
150mA
MAX5946
Figure 1. Functional Diagram