MAX891L Datasheet, PDF (1/8 Pages) Maxim Integrated Products – Current-Limited, High-Side P-Channel Switches with Thermal Shutdown

19-1223; Rev 0; 4/97
Current-Limited, High-Side
P-Channel Switches with Thermal Shutdown
_______________General Description
The MAX891L/MAX892L smart, low-voltage, P-channel,
MOSFET power switches are intended for high-side
load-switching applications. These switches operate
with inputs from 2.7V to 5.5V, making them ideal for
both 3V and 5V systems. Internal current-limiting circuitry
protects the input supply against overload. Thermal-
overload protection limits power dissipation and junc-
tion temperatures.
The MAX891L/MAX892L’s maximum current limits are
500mA and 250mA, respectively. The current limit
through the switch is programmed with a resistor from
SET to ground. When the switch is on, the quiescent
supply current is a low 13µA. When the switch is off, the
quiescent current decreases to 0.1µA.
The MAX891L/MAX892L are available in 8-pin µMAX
packages.
________________________Applications
PCMCIA Slots
Access Bus Slots
Portable Equipment
____________________________Features
o Ultra-Small µMAX Package—Only 1.11mm High
o 2.7V to 5.5V Input Range
o Programmable Current Limit
o Low 13µA Quiescent Current at V_IN = 3.3V,
0.1µA Switch Off
o Thermal Shutdown
o FAULT Indicator Output
o On-Resistances:
0.12Ω (MAX891L)
0.25Ω (MAX892L)
______________Ordering Information
PART
TEMP.
RANGE
PIN- CURRENT
PACKAGE LIMIT
MAX891LC/D
MAX891LEUA*
MAX892LC/D
MAX892LEUA*
0°C to +70°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
Dice**
8 µMAX
Dice**
8 µMAX
500mA
500mA
250mA
250mA
* To order these units in tape and reel, add (-T) to the end of the
part number.
** Dice are tested at T_A = +25°C.
__________Typical Operating Circuit __________________Pin Configuration
INPUT
1µF
IN
OUT
IN
100k
MAX891L ^OUT
MAX892L
FAULT
ON
GND
SET
OUTPUT
0.1µF
ON/OFF
TOP VIEW
IN 1
IN 2
ON 3
GND 4
MAX891L
MAX892L
8 ^OUT
7 ^OUT
6 FAULT
5 SET
µMAX
________________________________________________________________ Maxim Integrated Products 1
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