MAX892L Maxim, MAX892L Datasheet

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MAX892L

Manufacturer Part Number
MAX892L
Description
The MAX891L/MAX892L smart, low-voltage, P-channel, MOSFET power switches are intended for high-side load-switching applications
Manufacturer
Maxim
Datasheet

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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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MAX892L Summary of contents

Page 1

... 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 ...

Page 2

... 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

... OUT SET FAULT Logic Output Low Voltage I Turn-On Time V Turn-Off Time V Note 1: Tested with I = 50mA for the MAX891L, 25mA for the MAX892L, and V OUT Note 2: Parameters to -40°C are guaranteed by design, not production tested. _______________________________________________________________________________________ Current-Limited, High-Side CONDITIONS = 5V GND 0mA IN ...

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

... OUT Switch Output. P-channel MOSFET drain. Bypass OUT with a 0.1µF capacitor to ground. _______________Detailed Description The MAX891L/MAX892L P-channel MOSFET power switches limit output current to a user-programmed level. When the output current is increased beyond the set current level, the current is also increased ...

Page 7

... If the fault short-circuit condition is not removed, the switch will cycle on and off, resulting in a pulsed output. The MAX891L/MAX892L provide a fault output (FAULT). This open-drain output goes low when in current limit or when the die temperature exceeds +135°C. During start-up, FAULT is low until the switch is fully on and no over-current condition exists. A 100kΩ ...

Page 8

... MAX. ________________________________________________________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. 8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...

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