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PDF MAX895L Data sheet ( Hoja de datos )
| Número de pieza | MAX895L | |
| Descripción | 2A / Current-Limited / High-Side P-Channel Switch with Thermal Shutdown | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1278; Rev 0; 8/97
2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
_______________General Description
The MAX869L P-channel load switch features an accu-
rate user-set current limit and low on-resistance. This
switch is designed to protect your power source from
shorts and surges by limiting current and preventing
the system supply from being pulled low. The input volt-
age range is 2.7V to 5.5V.
The MAX869L features a 2A, 45mΩ switch controlled
by a logic signal. Current-limit accuracy is ±21%, and
can be set from 400mA to 2.4A using a single resistor.
The device has a low 12µA quiescent supply current,
which reduces to 2µA max in shutdown. It features ther-
mal-shutdown protection and a logic-signal output pin
(FAULT) that signals when there is an overcurrent or
overtemperature condition.
For other devices in this family, consult the Selector
Guide.
____________________________Features
o Very Small Footprint (16-pin QSOP is the same
size as an 8-pin SO)
o Low Resistance: 45mΩ at 3V
o ±21%-Accurate, User-Set Current Limit
o 12µA (typ) Quiescent Current
o 0.01µA (typ) Shutdown Current
o 0.04µA (typ) Leakage to Output when Switch
is Off
o 2.7V to 5.5V Input Range
o Thermal Shutdown
o FAULT Output
_____________________Selector Guide
PART
MAX869L
MAX890L
MAX891L
MAX892L
MAX894L
MAX895L
RON
AT 3V
(mΩ)
45
90
150
300
150
300
NOMINAL
CURRENT
(A)
2
1
0.5
0.25
0.5
0.25
COUNT
Single
Single
Single
Single
Dual
Dual
PACKAGE
16 QSOP
8 SO
8 µMAX
8 µMAX
8 SO
8 SO
______________Ordering Information
PART
TEMP. RANGE
MAX869LC/D
0°C to +70°C
MAX869LEEE
-40°C to +85°C
*Dice are specified at TA = +25°C.
PIN-PACKAGE
Dice*
16 QSOP
__________Typical Operating Circuit
________________________Applications
Universal Serial Bus (USB)
Notebook Computers
Personal Communicators
Palmtop Computers
Hand-Held Instruments
Portable Medical Instruments
INPUT
2.7V TO 5.5V
1µF*
100k
IN OUT
MAX869L
FAULT
GND
ON
SET
OUTPUT
UP TO 2A
0.1µF*
ON/OFF
RSET
Pin Configuration appears at end of data sheet.
*FOR USB APPLICATIONS, CIN = 1µF, COUT = 120µF
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
1 page  
2A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
FAST CURRENT-LIMIT RESPONSE
SLOW CURRENT-LIMIT RESPONSE
A
0V
B 0V
A
0V
B 0V
C
0A
D
0V
2µs/div
CIN = 100µF, COUT = 0.1µF
A: VFAULT, 5V/div
C: IOUT, 5A/div
B: VOUT, 5V/div
D: VIN, 5V/div
C
0A
D
0V
4µs/div
CIN = 100µF, COUT = 0.1µF
A: VFAULT, 5V/div
C: IOUT, 5A/div
B: VOUT, 5V/div
D: VIN, 5V/div
LOAD-TRANSIENT RESPONSE
A
0A
0V
B
A
0V
B
SWITCH TURN-ON TIME
10ms/div
VIN = 5V
A: IOUT = 0mA TO 1A, 0.5A/div
B: VOUT RIPPLE, 200mV/div, AC COUPLED
A
0V
B
SWITCH TURN-OFF TIME
0V
C
0A
D
C 0V
0A
D
0V
20µs/div
CIN = 100µF, COUT = 0.1µF, VIN = 5V, IOUT = 1A
A: VON, 5V/div
C: IOUT, 0.5A/div
B: VOUT, 2V/div
D: VFAULT, 2V/div
0V
2µs/div
CIN = 100µF, COUT = 0.1µF, VIN = 5V, IOUT = 1A
A: VON, 5V/div
C: IOUT, 0.5A/div
B: VOUT, 2V/div
D: VFAULT, 2V/div
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MAX895L.PDF ] | |
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