MAX4271/MAX4272/MAX4273
3V to 12V Current-Limiting Hot-Swap Controllers
with Autoretry, DualSpeed/BiLevel Fault Protection
4 _______________________________________________________________________________________
Input Voltage Range
Input can be driven to the absolute
maximum limit without false output
inversion
-0.1
13.2
I
B
COMP
0.001
1 μA
ON Pulse Width Low (Note 7)
t
RESTART
To unlatch a fault MAX4271, MAX4273 with
C
TIM
= IN
20 μs
DIGITAL OUTPUTS (STAT, OUTC)
Output Leakage Current V
STAT
≤ 13.2, V
OUTC
≤ 13.2 1 μA
Output Voltage Low V
OL
I
SINK
= 1mA 0.4 V
RETRY TIMING (MAX4272, MAX4273)
Retry Timeout Period
t
RETRY
100nF capacitor on C
TIM
(Note 5) 0.5 1 2 s
Default Retry
Timeout Period
t
RETRY
(default)
C
TIM
= no connection 176 µs
UNDERVOLTAGE LOCKOUT (UVLO)
Threshold
V
UVLO
Startup is initiated when this threshold is
exceeded at IN
2.25 2.67
V
U V LO
H YS T
t
D
UVLO
Time the input voltage must exceed
undervoltage lockout before startup is
initiated
100 150 200 ms
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +2.7V to +13.2V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
IN
= +5V and T
A
= +25°C.) (Note 3)
Note 3: All devices are 100% tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 4: Startup period is the time during which the slow comparator is ignored and the fast comparator regulates the sense current.
It is measured from the time ON is brought high.
Note 5: Inferred from test with C
TON
= 10nF (MAX4273) and C
TIM
= 1nF.
Note 6: The current available at GATE is a function of V
GATE
(see Typical Operating Characteristics).
Note 7: Guaranteed by design.
