Datasheet

MAX4271/MAX4272/MAX4273
3V to 12V Current-Limiting Hot-Swap Controllers
with Autoretry, DualSpeed/BiLevel Fault Protection
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(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)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: GATE can be pulled below LLMON, but current must be limited to 2mA.
Note 2: INC and ON can be pulled below ground. Limiting the current to 2mA ensures that these pins are never lower than about -0.8V.
IN to GND ............................................................................+15V
STAT, OUTC, LLMON, AUXVCC to GND ...............-0.3V to +14V
GATE to GND ..............................................-0.3V to (V
IN
+ 8.5V)
GATE to LLMON (Note 1).........................................-1V to +8.5V
INC, ON to GND (Note 2) .........................................-1V to +14V
CEXT to GND...............................................-8.5V to (V
IN
+ 0.3V)
CSPD, CTON,
REF to GND ...........-0.3V to the lower of (V
IN
+ 0.3V) or +12V
VSENSE, RTH, CTIM to GND.......................-0.3V to (V
IN
+ 0.3V)
Current into INC, ON (Note 2) ............................................±2mA
Current into Any Other Pin ...............................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
16-Pin SO (derate 8.7mW/°C above +70°C)................696mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLIES
Input Voltage Range V
IN
2.7
13.2
V
Supply Current I
Q
V
ON
= V
IN
0.6 1 mA
CURRENT CONTROL
T
A
= +25°C 455055
Slow Comparator Threshold
V
SC
,
TH
V
IN
- V
SENSE
T
A
= T
MIN
to T
MAX
43.5
56
mV
C
SPD
= floating 10 20 40 μs
Slow Comparator Response
Time
t
CSPD
C
SPD
= 100nF to GND 10 20 40 ms
T
A
= +25°C 455055
5kΩ on
RTH to
V
IN
T
A
= T
MIN
to T
MAX
43.5
56
T
A
= +25°C 675 750 825
75kΩ
on RTH
to V
IN
T
A
= T
MIN
to T
MAX
650 840
MAX4273
only
RTH = GN D
Fast Comparator Threshold
V
FC
,
TH
MAX4271/MAX4272
180 200 220
mV
Fast Comparator Response
Time
t
FCD
10mV overdrive, from overload condition to
gate discharging
350 ns
SENSE Input Bias Current
I
B
,
SENSE
V
SENSE
= V
IN
0.2 10 μA
MOSFET DRIVER
MAX4271/MAX4272 C
TIM
= 100nF 21 31
41
MAX4273 C
TON
= 100nF 21 31 41
ms
Startup Period
(Notes 4, 5)
t
START
No capacitor 5.5 μs
Gate Charge Current I
GATE
GATE = IN (Note 6) 100 μA