19-1146; Rev 4; 4/11
1.2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
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 protection limits power dissipation and junction temperatures.
The MAX890L’s maximum current limit is 1.2A. The current limit through the switch is programmed with a
resistor from SET to ground. The quiescent supply current is a low 10µA. When the switch is off, the supply
current decreases to 0.1µA.
Features
♦ +2.7V to +5.5V Input Range
♦ Programmable Current Limit
♦ Low Quiescent Current
10µA (typ) at VIN = +3.3V
0.1µA (typ) with Switch Off
♦ Thermal Shutdown
♦ FAULT Indicator Output
♦ 0.09Ω (typ) On-Resistance
The MAX890L is available in an 8-pin SO package.
Applications
Ordering Information
PCMCIA Slots
TEMP RANGE
Access Bus Slots
MAX890LC/D
Portable Equipment
PINPACKAGE
0°C to +70°C
PART
Dice**
CURRENT
LIMIT
1.2A
MAX890LESA+
-40°C to +85°C 8 SO
1.2A
MAX890LESA/V+
-40°C to +85°C 8 SO
1.2A
*To order this unit in tape and reel, add (T) to the end of the
part number.
**Dice are tested at TA = +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
OUT
OUTPUT
0.1μF
IN
MAX890L
OUT
100kΩ
+
IN 2
FAULT
ON
GND
SET
8 FAULT
IN 1
ON/OFF
MAX890L
7 OUT
ON 3
1μF
6 OUT
GND 4
5 SET
RSET
SO
________________________________________________________________ Maxim Integrated Products
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.
1
MAX890L
General Description
