Datasheet

MAX4271/MAX4272/MAX4273
3V to 12V Current-Limiting Hot-Swap Controllers
with Autoretry, DualSpeed/BiLevel Fault Protection
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
IN
= 5V, R
SENSE
= 100mΩ, C
BOARD
= 47µF, T
A
= +25°C, unless otherwise noted.)
0
0.4
0.2
0.8
0.6
1.0
1.2
1.6
1.4
1.8
02468101214161820
FAST GATE DISCHARGE CURRENT
vs. V
GATE
MAX4271/3-10
V
IN
(V)
FAST GATE DISCHARGE CURRENT (mA)
V
IN
= 12V
V
IN
= 3V
V
IN
= 5V
0
60
40
20
80
100
120
0862 4 10 12 14 16 18 20
GATE CHARGE CURRENT
vs. GATE VOLTAGE
MAX4271/3-11
V
GATE
(V)
I
GATE
(μA)
V
IN
= 12V
V
IN
= 5.0V
V
IN
= 3.0V
0
50
25
100
75
125
150
-40 10 35-15 60 85
GATE CHARGE CURRENT
vs. TEMPERATURE
MAX4271/3-12
TEMPERATURE (°C)
I
GATE
(μA)
V
IN
= 12V
V
GATE
= 0
V
IN
= 5V
V
IN
= 3V
0
5
15
10
20
25
042 6 8 101214
GATE VOLTAGE vs. INPUT VOLTAGE
MAX4271/3-13
V
IN
(V)
V
GATE
(V)
I
GATE
= 10μA
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
100
50
150
300
350
250
200
400
0 468102 1214161820
SLOW GATE DISCHARGE CURRENT
vs. GATE VOLTAGE
MAX4271/3-13a
V
GATE
(V)
I
GATE
(μA)
V
IN
= 12V
V
IN
= 3V
TRIGGERED BY A FAULT
OR BY ON FALLING
V
IN
= 5V
0.01 0.1 1 10 100 1000
TIME TO CHARGE GATE
vs. C
GATE
MAX4271/3-14
C
GATE
(nF)
TIME TO CHARGE GATE (ms)
1000
0.001
0.01
1
0.1
100
10
NO EXTERNAL MOSFET
V
IN
= 12V
TO V
GATE
= 17V
V
IN
= 5V
TO V
GATE
= 10V
V
IN
= 3V
TO V
GATE
= 6V
1.0
2.5
2.0
1.5
3.0
3.5
4.0
3.0 3.83.63.2 3.4 4.0 4.2 4.4 4.6 4.8 5.0
FAST GATE DISCHARGE CURRENT
vs. V
IN
MAX4271/3-15
FAST GATE DISCHARGE CURRENT (mA)
RISING V
IN
FALLING V
IN
V
IN
(V)
0
100
50
200
150
350
300
250
400
-40 10-15 35 60 85
SLOW GATE DISCHARGE CURRENT
vs. TEMPERATURE
MAX4271/3-16
TEMPERATURE (°C)
I
GATE
(μA)
V
IN
= 3V
V
IN
= 5V, 12V
V
GATE
= V
IN
TRIGGERED BY A FAULT
OR BY ON FALLING
0.01 0.1 1 10 100 1000
TIME TO SLOW DISCHARGE GATE
vs. C
GATE
MAX4271/3-17
C
GATE
(nF)
TIME TO DISCHARGE GATE (ms)
1000
0.001
1
0.1
0.01
10
100
V
IN
= 12V
V
IN
= 5V
V
IN
= 3V
DISCHARGE TO V
GATE
= 0.1V
NO EXTERNAL MOSFET