MAX893 Maxim, MAX893 Datasheet
MAX893
Manufacturer Part Number
MAX893
Description
1.2A / Current-Limited / High-Side P-Channel Switch with Thermal Shutdown
Manufacturer
Maxim
Datasheet
1.MAX893.pdf
(8 pages)
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The MAX893L 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-
ture.
The MAX893L’s maximum programmed current limit is
1.2A. The typical short-circuit current is 1.5 times the
programmed current; therefore, a 1.2A programmed
limit will result in a 1.8A short-circuit current limit. The
current limit through the switch is programmed with a
resistor from SET to ground. The quiescent supply cur-
rent is a low 13µA. When the switch is off, the supply
current decreases to 0.1µA.
The MAX893L is available in an 8-pin SO package.
________________________Applications
19-1450; Rev 0; 7/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
INPUT
*
USB SPECIFICATIONS REQUIRE HIGHER CAPACITANCE.
1 F
USB Ports
USB Hubs
PCMCIA Slots
Access Bus Slots
Portable Equipment
100k
P-Channel Switch with Thermal Shutdown
Typical Operating Circuit
IN
IN
FAULT
GND
________________________________________________________________ Maxim Integrated Products
MAX893L
General Description
OUT
OUT
SET
ON
1.2A, Current-Limited, High-Side
ON/OFF
R
SET
0.1 F
OUTPUT
*
____________________________Features
MAX893LESA
+2.7V to +5.5V Input Range
Programmable Current Limit
1.2A Continuous Load Current
1.8A Short-Circuit Current
Low Quiescent Current
Thermal Shutdown
FAULT Indicator Output
0.07Ω On-Resistance
TOP VIEW
0.2A to 1.2A Range
±20% Accuracy
PART
13µA at V
0.1µA with Switch Off
GND
IN
ON
IN
IN
= 3.3V
1
2
3
4
-40°C to +85°C
TEMP. RANGE
Ordering Information
MAX893L
SO
Pin Configuration
7
6
5
8
FAULT
OUT
OUT
SET
PIN-PACKAGE
8 SO
1
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