MAX890LC/D Maxim, MAX890LC/D Datasheet

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MAX890LC/D

Manufacturer Part Number
MAX890LC/D
Description
1A / Current-Limited / High-Side P-Channel Switch with Thermal Shutdown
Manufacturer
Maxim
Datasheet
1.MAX890LCD.pdf (8 pages)
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 sup-
ply against overload. Thermal-overload protection limits
power dissipation and junction temperatures.
The MAX890L’s maximum current limit is 1A. The cur-
rent limit through the switch is programmed with a
resistor from SET to ground. The quiescent supply cur-
rent is a low 10 A. When the switch is off, the supply
current decreases to 0.1 A.
The MAX890L is available in an 8-pin SO package.
________________________Applications
19-1146; Rev 2; 11/98
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
1 F
PCMCIA Slots
Access Bus Slots
Portable Equipment
100k
P-Channel Switch with Thermal Shutdown
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
IN
FAULT
GND
MAX890L
General Description
OUT
OUT
SET
ON
ON/OFF
1A, Current-Limited, High-Side
R
SET
0.1 F
OUTPUT
* To order this unit in tape and reel, add (-T) to the end of the part
** Dice are tested at T
____________________________Features
number.
MAX890LC/D
MAX890LESA
2.7V to 5.5V Input Range
Programmable Current Limit
Low Quiescent Current
Thermal Shutdown
FAULT Indicator Output
0.09Ω (typ) On-Resistance
TOP VIEW
PART*
10 A (typ) at V
0.1 A (typ) with Switch Off
GND
-40°C to +85°C
ON
IN
IN
0°C to +70°C
A
RANGE
1
2
3
4
TEMP.
= +25°C.
IN
Ordering Information
= 3.3V
MAX890L
SO
Pin Configuration
PACKAGE
Dice**
8 SO
PIN-
8
7
6
5
FAULT
OUT
OUT
SET
CURRENT
LIMIT
1A
1A
1

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MAX890LC/D Summary of contents

Page 1

... Low Quiescent Current 10 A (typ 0.1 A (typ) with Switch Off Thermal Shutdown FAULT Indicator Output 0.09Ω (typ) On-Resistance PART* MAX890LC/D MAX890LESA -40°C to +85° order this unit in tape and reel, add (-T) to the end of the part number. ** Dice are tested at T TOP VIEW OUTPUT 0 ...

Page 2

... SO (derate 5.88mW/°C above +70°C) ..........................471mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

P-Channel Switch with Thermal Shutdown ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note PARAMETER Operating Voltage Quiescent Current Off-Supply Current Off-Switch Current Undervoltage Lockout On-Resistance Current-Limit-Amplifier Threshold Current ...

Page 4

Current-Limited, High-Side P-Channel Switch with Thermal Shutdown __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A QUIESCENT CURRENT vs. INPUT VOLTAGE GND OUT ...

Page 5

P-Channel Switch with Thermal Shutdown ____________________________Typical Operating Characteristics (continued +25°C, unless otherwise noted.) A CURRENT-LIMIT RESPONSE ( 0V, 0A 2µs/div C = 100µ 0.1µF IN OUT ...

Page 6

... LIMIT This switch is not bidirectional; therefore, the input volt- age must be higher than the output voltage. Setting the Current Limit The MAX890L features internal current-limiting circuitry with a maximum programmable value (I best performance, set the current limit (I ≤ I ≤ This current limit remains in ...

Page 7

P-Channel Switch with Thermal Shutdown MAX890L SET GND Figure 2. Setting the Current Limit Thermal Shutdown The MAX890L features thermal shutdown. The switch turns off when the junction temperature exceeds +135°C. Once the device cools by 10°C, the switch turns ...

Page 8

... P-Channel Switch with Thermal Shutdown ________________________________________________________Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...

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