Datasheet

MAX5946
Dual PCI Express, Hot-Plug
Controller
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
12VIN
= V
12S_-
= V
12S_+
= 12V, V
3.3S_+
= V
3.3S_-
= V
3.3VAUXIN
= V
ON_
= V
AUXON_
= V
FON__
= 3.3V, PWRGD_ = FAULT_ = PORADJ
= TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES_DET_ = PGND = GND, T
A
= -40°C to +85°C, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
3.3V CONTROL
3.3V Current-Limit Threshold
(V
3.3S_+
- V
3.3S_-
)
V
3.3ILIM
17 20 23
mV
3.3G_ Gate Charge Current
I
3.3G_CHG
V
3.3G_
= GND 4 5 6 µA
ON_ = GND, V
3.3G_
= 2V
50 150 250
µA
3.3G_ Gate Discharge
Current
I
3.3G_DIS
O utp ut shor t- ci r cui t cond i ti on, str ong g ate p ul l d ow n
to r eg ul ati on, V
3 .3 S _ +
- V
3 .3 S _
≥ 1V , V
3 .3 G_
= 5V
100 150 220
mA
3.3G_ Gate High Voltage
(V
3.3G_
- V
3.3S_+
)
V
3.3G_H
Sourcing 1µA
4.5 5.5 6.8
V
3.3G_ Threshold Voltage For
PWRGD_ Assertion (Note 2)
V
PGTH3.3
Referred to V
3.3VAUXIN
, I
3.3G_
= 1µA
-3.0
-4
-4.5
V
3.3S_- Input Bias Current 1µA
3.3S_+ Input Bias Current
20 60
µA
3.3V AUXILIARY SUPPLY
3.3VAUXIN Supply Voltage
Range
V
3.3VAUXIN
3.0 3.3 3.6
V
3.3VAUXIN rising
2.52 2.65 2.78
V
3.3VAUXIN Undervoltage
Lockout
V
3 .3 V A U X U V L O
Hysteresis
30
mV
3.3VAUXIN Supply Current V
3.3VAUXIN
= 3.6V
1.5
3mA
3.3VAUXIN to 3.3VAUXO_
Maximum Dropout
I
3.3VAUXO_
= 375mA
225
mV
3.3VAUXO_ Current-Limit
Threshold
3.3VAUXO_ shorted to GND
376 470 564
mA
3.3VAUXO_ Threshold For
PWRGD_ Assertion
(V
3.3VAUXIN
- V
3.3VAUXO_
)
(Note 3)
V
PGTH3.3AUX
400
mV
LOGIC SIGNALS
Rising edge
1.0 2.0
V
Input-Logic Threshold
(ON_, FON_, AUXON_,
PRES-DET_, INPUT_)
Hysteresis
25
mV
Input Bias Current
(ON_, AUXON_, INPUT_)
1µA
FON_, PRES-DET_ Internal
Pullup
25 50 75
kΩ
ON_, AUXON_ High-to-Low
Deglitch Time
4µs