Datasheet

MAX4838A/MAX4840A/MAX4842A
Overvoltage-Protection Controllers with
Status
FLAG
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V (MAX4838A/MAX4840A), V
IN
= +4V (MAX4842A), T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
IN to GND ..............................................................-0.3V to +30V
GATE to GND ........................................................-0.3V to +12V
EN, FLAG to GND ....................................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
6-Pin µDFN (derate 2.1mW/°C above +70°C) ............477mW
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
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Input Voltage Range V
IN
1.2
28.0
V
MAX4838A/MAX4840A
3.0
3.25
3.5
Undervoltage-Lockout Threshold
UVLO V
IN
falling
MAX4842A 2.3 2.5 2.7
V
Undervoltage-Lockout Hysteresis
50 mV
V
IN
rising MAX4838A 7.0 7.4 7.8
V
IN
rising MAX4840A 5.5 5.8 6.1
Overvoltage Trip Level OVLO
V
IN
rising MAX4842A 4.4 4.7 5.0
V
MAX4838A
100
MAX4840A 80
Overvoltage Trip Level Hysteresis
MAX4842A 50
mV
No load, EN = GND or 5V,
V
IN
= 5V (MAX4838A/MAX4840A)
80 200
IN Supply Current I
IN
No load, EN = GND or 4.0V,
V
IN
= 4V (MAX4842A)
75 160
µA
V
IN
= 2.9V (MAX4838A/MAX4840A) 30
UVLO Supply Current I
UVLO
V
IN
= 2.2V (MAX4842A) 22
µA
MAX4838A/MAX4840A
910
GATE Voltage V
GATE
I
GATE
sourcing 1µA
MAX4842A 7.5 8.0
V
GATE Pulldown Current I
PD
V
IN
> V
OVLO
, V
GATE
= 5.5V 27 mA
1.2V ≤ V
IN
< UVLO,
I
SINK
= 50µA
0.4
FLAG Output Low Voltage V
OL
FLAG asserted
V
IN
≥ OVLO, I
SINK
=
1mA
0.4
V
FLAG Output High Leakage I
OH
V
FLAG
= 5.5V, FLAG deasserted 1 µA
EN Input High Voltage V
IH
1.5 V
EN Input Low Voltage V
IL
0.4 V
EN Input Leakage I
LKG
EN = GND or 5.5V 1 µA