Datasheet

MAX4271/MAX4272/MAX4273
3V to 12V Current-Limiting Hot-Swap Controllers
with Autoretry, DualSpeed/BiLevel Fault Protection
_______________________________________________________________________________________ 5
Typical Operating Characteristics
(V
IN
= 5V, R
SENSE
= 100mΩ, C
BOARD
= 47µF, T
A
= +25°C, unless otherwise noted.)
0
0.3
0.2
0.1
0.5
0.4
0.9
0.8
0.7
0.6
1.0
02468101214
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX4271/3-01
V
IN
(V)
SUPPLY CURRENT (mA)
ON = V
IN
I
GATE
= 10μA
ON = GND
-40 -15 10 35 60 85
SUPPLY CURRENT vs. TEMPERATURE
MAX4271/3-02
TEMPERATURE (°C)
0
0.3
0.2
0.1
0.5
0.4
0.9
0.8
0.7
0.6
1.0
SUPPLY CURRENT (mA)
ON = V
IN
V
IN
= 12V
V
IN
= 5V
V
IN
= 3V
180
200
190
220
210
230
240
18
20
19
22
21
23
24
0682 4 10 12 14
SLOW COMPARATOR
RESPONSE TIME vs. INPUT VOLTAGE
MAX4271/3-03
V
IN
(V)
t
CSPD
(μs)
t
CSPD
(ms)
CSPD = 110nF
TIME IN ms
CSPD = 0
TIME IN μs
49.0
49.6
49.4
49.2
50.0
49.8
50.8
50.6
50.4
50.2
51.0
02468101214
SLOW COMPARATOR THRESHOLD
vs. INPUT VOLTAGE
MAX4271/3-04
V
IN
(V)
V
SC,TH
(mV)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
200
250
350
300
400
450
1 10 100 1000
FAST COMPARATOR RESPONSE TIME
vs. OVERDRIVE VOLTAGE
MAX4271/3-05
OVERDRIVE VOLTAGE (mV)
RESPONSE TIME (ns)
V
IN
= 12V
V
IN
= 5V
V
IN
= 3V
200
300
400
350
450
500
-40 10-15 35 60 85
FAST COMPARATOR RESPONSE TIME
vs. TEMPERATURE
MAX4271/3-06
TEMPERATURE (°C)
RESPONSE TIME (ns)
V
IN
= 12V
V
IN
= 5V
V
IN
= 3V
250
190
196
194
192
200
198
208
206
204
202
210
FAST COMPARATOR THRESHOLD
vs. INPUT VOLTAGE
MAX4271/3-07
V
FC,TH
(mV)
02468101214
V
IN
(V)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
0.1
1
1k
100
10
10k
100k
0.01 10.1 10 100 1000
TIME TO FAST DISCHARGE GATE
vs. C
GATE
MAX4271/3-08
C
GATE
(nF)
TIME TO DISCHARGE GATE (μs)
V
IN
= 12V
V
IN
= 5V
V
IN
= 3V
NO EXTERNAL MOSFET
DISCHARGE TO V
GATE
= 0.1V
250
270
310
290
330
350
042 6 8 101214
STARTUP PERIOD
vs. INPUT VOLTAGE
MAX4271/3-09
V
IN
(V)
t
START
(μs)
25
27
31
29
33
35
t
START
(ms)
C
TIM
= 100nF
TIME IN ms
C
TIM
= 1nF
TIME IN μs