Datasheet
MAX5946
Dual PCI Express, Hot-Plug
Controller
_______________________________________________________________________________________ 5
12VIN INPUT SUPPLY CURRENT
vs. TEMPERATURE
MAX5946 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
603510-15
0.491
0.492
0.493
0.494
0.495
0.496
0.497
0.498
0.499
0.500
0.501
0.502
0.503
0.504
0.505
0.490
-40 85
3.3VAUXIN SUPPLY CURRENT
vs. TEMPERATURE
MAX5946 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
603510-15
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
-40 85
ON AND AUXON LOW-TO-HIGH THRESHOLD
VOLTAGE vs. TEMPERATURE
MAX5946 toc03
TEMPERATURE (°C)
THRESHOLD VOLTAGE (V)
603510-15
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
1.0
-40 85
ON_ OR AUXON_
3.3VAUXO_ OUTPUT VOLTAGE vs. CURRENT
MAX5946 toc04
OUTPUT CURRENT (A)
OUTPUT VOLTAGE (V)
0.50.40.30.20.1
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
00.6
12G_ AND 3.3G_ GATE CHARGE
CURRENT vs. TEMPERATURE
MAX5946 toc05
TEMPERATURE (°C)
GATE CHARGE CURRENT (µA)
603510-15
4.90
4.95
5.00
5.05
5.10
5.15
5.20
5.25
5.30
5.35
4.85
-40 85
12G_
3.3G_
12G_ AND 3.3G_ GATE DISCHARGE
CURRENT vs. TEMPERATURE
MAX5946 toc06
TEMPERATURE (°C)
GATE DISCHARGE CURRENT (µA)
603510-15
150
155
160
165
170
145
-40 85
3.3G_
12G_
3.3VAUX INTERNAL SWITCH
MAXIMUM DROPOUT vs. TEMPERATURE
MAX5946 toc07
TEMPERATURE (°C)
DROPOUT VOLTAGE (V)
603510-15
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0
-40 85
AUXILIARY OUTPUT CURRENT = 375mA
12V AND 3.3V CURRENT-LIMIT THRESHOLD
VOLTAGE vs. TEMPERATURE
MAX5946 toc08
TEMPERATURE (°C)
CURRENT-LIMIT THRESHOLD VOLTAGE (mV)
603510-15
10
20
30
40
50
60
0
-40 85
12V CURRENT-SENSE
THRESHOLD
3.3V CURRENT-SENSE
THRESHOLD
AUXILIARY CURRENT LIMIT
vs. TEMPERATURE
MAX5946 toc09
TEMPERATURE (°C)
AUXILIARY CURRENT LIMIT (A)
603510-15
0.455
0.460
0.465
0.470
0.475
0.480
0.485
0.490
0.495
0.500
0.450
-40 85
Typical Operating Characteristics
(V
12VIN
= V
12SA+
= 12V, V
3.3VAUXIN
= V
3.3S_+
= V
ON_
= V
AUXON_
= V
INPUT_
= 3.3V, PRES-DET_ = GND, FON_ = PORADJ = TIM =
float, FAULT_ = 10kΩ to 3.3VAUXIN, PWRGDA = 10kΩ to 3.3VAUXO_, T
A
= +25°C, unless otherwise noted, see the Typical
Application Circuit.)