1A Current-Limited Switch for 2 USB Ports
MAX1922
ABSOLUTE MAXIMUM RATINGS
IN,
EN, OC
to GND...................................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V
IN
+ 0.3V)
Maximum Switch Current.........................2.3A (internally limited)
OUT Short-Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
Operating Temperature Range (extended) .........-40°C to +85°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
(V
IN
= 5V,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
OPERATING CONDITION
Input Voltage
POWER SWITCH
Switch Static Drain-Source On-
State Resistance
Switch Turn-On Time
Switch Turn-Off Time
ENABLE INPUT (EN)
EN
High-Level Input Voltage
EN
Low-Level Input Voltage
EN
Input Current
Startup Time
CURRENT LIMIT
Overload Output Current
Short-Circuit Output Current
SUPPLY CURRENT
Supply Current, Low-Level Input
Supply Current, High-Level
Input
Supply-Leakage Current
UNDERVOLTAGE LOCKOUT
Undervoltage Lockout
OVERCURRENT (OC)
OC
Threshold
OC
Output Low Voltage
V
OL
I
SINK
= 1mA, V
IN
= 3V
1.1
0.4
A
V
UVLO
Rising edge, 100mV hysteresis
2.0
2.4
2.6
V
I
Q
V
EN
= V
IN
= V
OUT
= 5.5V
V
EN
= 0, I
OUT
= 0
V
EN
= V
IN
= 5.5V,
V
OUT
= 0
Timer not running
Timer running
T
A
= +25°C
T
A
= 0°C to +85°C
0.002
16
35
0.01
2
15
1
25
µA
µA
µA
I
LIMIT
I
SC
Force V
OUT
to 4.5V
OUT shorted to GND
1.4
1.75
1
2.1
1.4
A
A
V
IH
V
IL
V
IN
= 2.7V to 3.6V
V
IN
= 3.7V to 5.5V
V
IN
= 2.7V to 5.5V
V
EN
= V
IN
or GND
V
IN
= 5V, C
OUT
= 150µF from
EN
driven low
to 50% full V
OUT
-1
1
2.0
2.4
0.8
1
V
V
µA
ms
T
A
= +25°C
R
DS(ON)
t
ON
t
OFF
T
A
= 0°C to +85°C
I
LOAD
= 400mA
I
LOAD
= 400mA
3
V
IN
= 4.4V to 5.5V
V
IN
= 4.4V to 5.5V
V
IN
= 3V
72
80
6
70
100
125
150
200
20
µs
µs
mΩ
V
IN
2.7
5.5
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
