MAX4943ELAT Ver la hoja de datos (PDF) - Maxim Integrated
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MAX4943ELAT Datasheet PDF : 10 Pages
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Overvoltage-Protection Controllers with
Internal FET
ABSOLUTE MAXIMUM RATINGS
IN ............................................................................-0.3V to +30V
OUT ...............................................................-0.3V to (IN + 0.3V)
GP...........................................................................-0.3V to +12V
IN to GP ..................................................................-0.3V to +22V
ACOK .......................................................................-0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
8-Pin µDFN (derate 4.8mW/°C above +70°C) ..............381mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(VIN = +5V (MAX4943/MAX4944_/MAX4945_/MAX4949), VIN = +3V (MAX4946), TA = -40°C to +85°C, unless otherwise noted.
Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Input Voltage Range
Input Supply Current
UVLO Supply Current
IN Undervoltage Lockout
SYMBOL
VIN
IIN
IUVLO
VUVLO
CONDITIONS
VIN = 3V (MAX4946)
VIN = 5V, all remaining parts
VIN = 2.2V
MAX4943/MAX4944/
MAX4944B/MAX4945/
(VIN falling)
MAX4945A/ MAX4945B
MAX4944L/MAX4945L/
MAX4946/MAX4949
MIN
2.2
3.90
2.30
TYP
50
50
4.15
2.45
MAX
28.0
150
150
30
UNITS
V
µA
µA
4.40
V
2.60
IN Undervoltage-Lockout
Hysteresis
1
%
Overvoltage Trip Level
VOVLO (VIN rising)
MAX4943
7.00
7.4
7.80
MAX4944_
6.00 6.35 6.70
MAX4945/MAX4945B/L 5.50 5.80 6.10
V
MAX4945A
5.50 5.80 6.00
MAX4946
4.30 4.56 4.82
MAX4949
8.20 8.90 9.60
IN Overvoltage Hysteresis
1
%
Switch On-Resistance
RON
VIN = 3V (MAX4946), IOUT = 1A
VIN = 5V, all remaining parts, IOUT = 1A
80
200
mΩ
80
200
MAX4943–MAX4946 TA = +25°C
1.2
1.7
4.0
Overcurrent Protection Threshold
ILIM
MAX4949
TA = TMIN to TMAX
1.2
1.7
4.0
A
TA = +25°C
2.0
3.5
5.0
TA = TMIN to TMAX
2.0
3.0
5.0
GP Clamp Voltage
GP Pulldown Resistor
IGPD
RGPD
(VIN - VGP), VIN = 28V
13
16
19
V
50
kΩ
2 _______________________________________________________________________________________
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