MAX890L_11 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown

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
PCMCIA Slots
Access Bus Slots
Portable Equipment
Applications
Ordering Information
PART
PIN-
CURRENT
TEMP RANGE _{PACKAGE LIMIT}
MAX890LC/D
0°C to +70°C Dice**
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 T_A = +25°C.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Typical Operating Circuit
Pin Configuration
INPUT
1μF
IN
OUT
IN _MAX890L OUT
100kΩ
FAULT
ON
GND
SET
OUTPUT
0.1μF
ON/OFF
R_SET
TOP VIEW
+
IN 1
IN 2
ON 3
MAX890L
GND 4
8 ^FAULT
7 ^OUT
6 OUT
5 SET
SO
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