MAX890L Maxim, MAX890L Datasheet

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MAX890L

Manufacturer Part Number
MAX890L
Description
The MAX890L smart, low-voltage, P-channel, MOSFET power switch is intended for high-side load-switching applications
Manufacturer
Maxim
Datasheet

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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 supply against overload. Thermal-overload pro-
tection limits power dissipation and junction tempera-
tures.
The MAX890L’s maximum current limit is 1.2A. The cur-
rent limit through the switch is programmed with a
resistor from SET to ground. The quiescent supply cur-
rent is a low 10µA. When the switch is off, the supply
current decreases to 0.1µA.
The MAX890L is available in an 8-pin SO package.
19-1146; Rev 4; 4/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
INPUT
1μF
PCMCIA Slots
Access Bus Slots
Portable Equipment
100kΩ
P-Channel Switch with Thermal Shutdown
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
IN
FAULT
GND
MAX890L
General Description
OUT
OUT
SET
ON
Applications
1.2A, Current-Limited, High-Side
ON/OFF
R
SET
0.1μF
OUTPUT
♦ ♦ +2.7V to +5.5V Input Range
♦ ♦ Programmable Current Limit
♦ ♦ Low Quiescent Current
♦ ♦ Thermal Shutdown
♦ ♦ FAULT Indicator Output
♦ ♦ 0.09Ω (typ) On-Resistance
* To order this unit in tape and reel, add (T) to the end of the
part number.
** Dice are tested at T
+ Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
MAX890LC/D
MAX890LESA+
MAX890LESA/V+
TOP VIEW
10µA (typ) at V
0.1µA (typ) with Switch Off
PART
GND
ON
IN
IN
-40°C to +85°C 8 SO
-40°C to +85°C 8 SO
TEMP RANGE
A
1
2
3
4
0°C to +70°C
= +25°C.
IN
+
Ordering Information
= +3.3V
MAX890L
SO
Pin Configuration
PIN-
PACKAGE
Dice**
8
7
6
5
FAULT
OUT
OUT
SET
Features
CURRENT
LIMIT
1.2A
1.2A
1.2A
1

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MAX890L Summary of contents

Page 1

... Thermal-overload pro- tection limits power dissipation and junction tempera- tures. The MAX890L’s maximum current limit is 1.2A. The cur- rent limit through the switch is programmed with a resistor from SET to ground. The quiescent supply cur- rent is a low 10µA. When the switch is off, the supply current decreases to 0.1µ ...

Page 2

... FAULT Logic Output High Leakage Current Slow-Current-Loop Response Time Fast-Current-Loop Response Time Turn-On Time Turn-Off Time 2 _______________________________________________________________________________________ Operating Temperature Range MAX890LESA ....................................................-40°C to +85°C + 0.3V) Storage Temperature Range ........................... -65°C to +150°C IN Lead Temperature (soldering, 10s) . ...............................+300°C Soldering Temperature (reflow) .......................................+260°C = +25°C.) A ...

Page 3

P-Channel Switch with Thermal Shutdown ELECTRICAL CHARACTERISTICS (V = +3V -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 OUTPUT OVERLOAD (SLOW LOOP RESPONSE 0V, 0A 2μs/div C = 100μ 0.1μF IN OUT 1V/div, AC-COUPLED ...

Page 6

... I is the desired current limit. LIMIT Short-Circuit Protection The MAX890L is a short-circuit-protected switch. In the event of an output short circuit or current-overload con- dition, the current through the switch is limited by the internal current-limiting error amplifier to 1 When the fault condition is removed, the replica error ...

Page 7

... If the fault short-circuit condition is not removed, the switch cycles on and off, resulting in a pulsed output. The MAX890L provides a fault output (FAULT). This open-drain output goes low when in current limit or when the die temperature exceeds +135°C. A 100kΩ ...

Page 8

... P-Channel Switch with Thermal Shutdown REVISION REVISION NUMBER DATE Added the MAX890LESA/V+ part number to the Ordering Information, deleted the Chip 4 4/11 Information section Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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