19-1146; Rev 4; 4/11
1.2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
General Description
The MAX890L smart, low-voltage, P-channel, MOSFET
power switch is intended for high-side load-switching
applications. This switch operates with inputs from
+2.7V to +5.5V, making it ideal for both +3V and +5V
systems. Internal current-limiting circuitry protects the
input supply against overload. Thermal-overload pro-
tection limits power dissipation and junction tempera-
tures.
The MAX890L’s maximum current limit is 1.2A. The cur-
rent limit through the switch is programmed with a
resistor from SET to ground. The quiescent supply cur-
rent is a low 10µA. When the switch is off, the supply
current decreases to 0.1µA.
The MAX890L is available in an 8-pin SO package.
♦
+2.7V to +5.5V Input Range
♦
Programmable Current Limit
♦
Low Quiescent Current
10µA (typ) at V
IN
= +3.3V
0.1µA (typ) with Switch Off
♦
Thermal Shutdown
♦
FAULT
Indicator Output
♦
0.09Ω (typ) On-Resistance
Features
MAX890L
Applications
PCMCIA Slots
Access Bus Slots
Portable Equipment
PART
MAX890LC/D
MAX890LESA+
MAX890LESA/V+
Ordering Information
TEMP RANGE
0°C to +70°C
PIN-
PACKAGE
Dice**
CURRENT
LIMIT
1.2A
1.2A
1.2A
-40°C to +85°C 8 SO
-40°C to +85°C 8 SO
*To
order this unit in tape and reel, add (T) to the end of the
part number.
**Dice
are tested at T
A
= +25°C.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Typical Operating Circuit
Pin Configuration
TOP VIEW
INPUT
IN
IN
100kΩ
FAULT
1μF
GND
ON
SET
R
SET
ON/OFF
ON
3
GND
4
OUT
OUTPUT
0.1μF
+
IN
1
IN
2
8
FAULT
MAX890L
OUT
MAX890L
7
OUT
6
OUT
5
SET
SO
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
