User Manual

MAX5957/MAX5958
Triple PCI Express, Hot-Plug Controllers
14 ______________________________________________________________________________________
5µA
12S_-
12G_
12S_+
54mV
108mV
R
SENSE
150µA
10µA
100µA
-
+
-
+
10µA
120mA
5µA
3.3S_-
3.3G_
3.3S_+
20mV40mV
150µA
3.3AUXO
PRES-DET_FON_
AUXON_
UVLO
V
REF
ON_
R
SENSE
-
+
-
+
10µA
150mA
CHARGE
PUMP
-
+
R
TIM
TIM
IN OUT 12VIN
PWRGD_ FAULT_
R
PORADJ
PORADJ
DEBOUNCE
FAST
OSCILLATOR
CONTROL LOGIC
MAIN-CHANNEL
CONTROL LOGIC
AUX-CHANNEL
INPUT COMPARATOR AND
CHIP CONTROL LOGIC
t
FAULT
t
POR
OSCILLATOR
MAX5957
BIAS, REFERENCES,
AND UVLO
CONTROL LOGIC
MAIN-CHANNEL
CONTROL LOGIC
AUX-CHANNEL
CHARGE
PUMP
100µA
Figure 1. Single-Channel Internal Block Diagram