MAX891L/MAX892L
Current-Limited, High-Side
P-Channel Switches with Thermal Shutdown
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 3V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°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.
IN to GND ..................................................................-0.3V to 6V
ON, FAULT to GND.................................................... -0.3V to 6V
SET, OUT to GND........................................-0.3V to (V
IN
+ 0.3V)
Maximum Continuous Switch Current
MAX891L ..........................................................................0.75A
MAX892L ........................................................................0.375A
Continuous Power Dissipation (T
A
= +70°C)
µMAX (derate 4.1mW/°C above +70°C) .......................330mW
Operating Temperature Range
MAX891LEUA/MAX892LEUA ............................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10sec) ........................... +300°C
20% current overdrive, V
IN
= 5V
V
FAULT
= 5.5V, V
SET
= 1V
I
SINK
= 1mA, V
SET
= 1.4V
ON = IN, V
IN
= V
OUT
= 5.5V
V
SET
= 1.24V, I
OUT
= 0mA
V
ON
= 5.5V
V
IN
= 5V, ON = GND, I
OUT
= 0mA
V
IN
= 4.5V to 5.5V
V
IN
= 2.7V to 3.6V
V
IN
= 2.7V to 5.5V
V
OUT
= 1.6V to 2.8V
MAX891L
V
SET
required to turn the switch off (Note 1)
MAX891L, I
OUT
= 250mA
V
IN
= 3.0V
MAX891L
MAX891L
V
IN
= 4.5V
MAX892L
MAX892L
CONDITIONS
µs5Slow-Current-Loop Response Time
µA0.05 1
MAX892L
FAULT Logic Output High Leakage
V0.4
MAX892L, I
OUT
= 125mA
FAULT Logic Output Low Voltage
µA0.5 3
I
OUT
= 250mA (MAX891L), or 125mA
(MAX892L)
I
SET
Bias Current
µA-1 0.01 1
ON Input Leakage
V
2.4
ON Input High Voltage
2.0
V
IN
= 5V
µs
V0.8
2
ON Input Low Voltage
A/A
Fast-Current-Loop Response Time
I
OUT
to I
SET
Current Ratio
V
IN
= 3V
840 965 1130
µs
100 200
Turn-On Time
840 965 1130
V
IN
= 5V µs
mA
0.8 2 20
Maximum Output Current
Turn-Off Time
250
µA0.02 1Off-Supply Current
µA13 20
V2.7 5.5Operating Voltage
Quiescent Current
500
V1.178 1.240 1.302Current-Limit-Amplifier Accuracy
mΩ
On-Resistance
300 500
120 225
250 420
150 300
UNITSMIN TYP MAXPARAMETER
mΩ
150
ON = IN, V
IN
= 5.5V, V
OUT
= 0V
µA0.02 3Off-Switch Current
Rising edge, 1% hysteresis V2.0 2.3 2.6Undervoltage Lockout
