MAX891LEUA Maxim Integrated Products, MAX891LEUA Datasheet

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MAX891LEUA

Manufacturer Part Number
MAX891LEUA
Description
Current Limit SW 1-IN 1-OUT 2.7V to 5.5V 0.5A 8-Pin uMAX
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX891LEUA

Package
8uMAX
Input Voltage
2.7 to 5.5 V
Maximum Output Current
0.5(Typ) A
Number Of Outputs
1
Operating Temperature
-40 to 85 °C

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0
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
19-1223; Rev 0; 4/97
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
__________Typical Operating Circuit
INPUT
_______________General Description
1 F
PCMCIA Slots
Access Bus Slots
Portable Equipment
P-Channel Switches with Thermal Shutdown
100k
IN
IN
FAULT
GND
________________________________________________________________ Maxim Integrated Products
MAX891L
MAX892L
OUT
OUT
SET
ON
ON/OFF
0.1 F
OUTPUT
Current-Limited, High-Side
* To order these units in tape and reel, add (-T) to the end of the
** Dice are tested at T
____________________________Features
MAX891LC/D
MAX891LEUA*
MAX892LC/D
MAX892LEUA*
__________________Pin Configuration
______________Ordering Information
part number.
Ultra-Small µMAX Package—Only 1.11mm High
2.7V to 5.5V Input Range
Programmable Current Limit
Low 13µA Quiescent Current at V
0.1µA Switch Off
Thermal Shutdown
FAULT Indicator Output
On-Resistances:
PART
TOP VIEW
0.12Ω (MAX891L)
0.25Ω (MAX892L)
GND
-40°C to +85°C
-40°C to +85°C
ON
IN
IN
0°C to +70°C
0°C to +70°C
A
RANGE
= +25°C.
1
2
3
4
TEMP.
MAX891L
MAX892L
MAX
PACKAGE
Dice**
8 µMAX
Dice**
8 µMAX
PIN-
8
7
6
5
IN
OUT
OUT
FAULT
SET
= 3.3V,
CURRENT
500mA
500mA
250mA
250mA
LIMIT
1

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MAX891LEUA Summary of contents

Page 1

... Thermal Shutdown FAULT Indicator Output On-Resistances: 0.12Ω (MAX891L) 0.25Ω (MAX892L) ______________Ordering Information PART MAX891LC/D MAX891LEUA* MAX892LC/D MAX892LEUA order these units in tape and reel, add (-T) to the end of the part number. ** Dice are tested at T __________________Pin Configuration TOP VIEW OUT OUTPUT 0 ...

Page 2

... Turn-On Time (MAX892L) Turn-Off Time _______________________________________________________________________________________ Continuous Power Dissipation (T µMAX (derate 4.1mW/°C above +70°C) .......................330mW + 0.3V) Operating Temperature Range IN MAX891LEUA/MAX892LEUA ............................-40°C to +85°C Storage Temperature Range ............................-65°C to +150°C Lead Temperature (soldering, 10sec) ........................... +300°C = +25°C.) A CONDITIONS = 5V GND 0mA OUT = V = 5.5V IN OUT = 5 ...

Page 3

P-Channel Switches with Thermal Shutdown ELECTRICAL CHARACTERISTICS ( -40°C to +85°C, unless otherwise noted.) (Note PARAMETER Operating Voltage Quiescent Current IN, V Off-Supply Current ON = IN, V Off-Switch Current ...

Page 4

Current-Limited, High-Side P-Channel Switches with Thermal Shutdown __________________________________________Typical Operating Characteristics (Typical Operating Circuit +25°C, unless otherwise noted.) A QUIESCENT CURRENT vs. INPUT VOLTAGE INPUT ...

Page 5

P-Channel Switches with Thermal Shutdown ____________________________Typical Operating Characteristics (continued) (Typical Operating Circuit +25°C, unless otherwise noted.) A CURRENT-LIMIT RESPONSE (MAX891L 0 2µs/div C = 47µ 0.1µF B: ...

Page 6

Current-Limited, High-Side P-Channel Switches with Thermal Shutdown ______________________________________________________________Pin Description PIN NAME Input. P-channel MOSFET source. Bypass IN with a 1µF capacitor to ground Active-Low Switch On Input. A logic low turns the switch on. 4 ...

Page 7

P-Channel Switches with Thermal Shutdown MAX891L MAX892L SET GND Figure 2. Setting the Current Limit Thermal Shutdown The MAX891L/MAX892L feature thermal shutdown. The switch turns off when the junction temperature exceeds +135°C. Once the device cools by 10°C, the switch ...

Page 8

... 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. 8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © 1997 Maxim Integrated Products 2.0 ±0.05 A0 4.0 ± ...

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