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PDF MAX890LESA Data sheet ( Hoja de datos )
| Número de pieza | MAX890LESA | |
| Descripción | 1A / Current-Limited / High-Side P-Channel Switch with Thermal Shutdown | |
| Fabricantes | Maxim Integrated | |
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19-1146; Rev 2; 11/98
1A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
General Description
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 10µA. When the switch is off, the supply
current decreases to 0.1µA.
The MAX890L is available in an 8-pin SO package.
____________________________Features
o 2.7V to 5.5V Input Range
o Programmable Current Limit
o Low Quiescent Current
10µA (typ) at VIN = 3.3V
0.1µA (typ) with Switch Off
o Thermal Shutdown
o FAULT Indicator Output
o 0.09Ω (typ) On-Resistance
________________________Applications
PCMCIA Slots
Access Bus Slots
Portable Equipment
Ordering Information
PART*
MAX890LC/D
MAX890LESA
TEMP.
RANGE
0°C to +70°C
-40°C to +85°C
PIN-
PACKAGE
Dice**
8 SO
CURRENT
LIMIT
1A
1A
* To order this unit in tape and reel, add (-T) to the end of the part
number.
** Dice are tested at TA = +25°C.
Typical Operating Circuit
Pin Configuration
INPUT
1µF
IN
IN MAX890L
100kΩ
FAULT
GND
OUT
OUT
ON
SET
OUTPUT
0.1µF
ON/OFF
RSET
TOP VIEW
IN 1
IN 2
ON 3
GND 4
MAX890L
8 FAULT
7 OUT
6 OUT
5 SET
SO
________________________________________________________________ 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 1-800-835-8769.
1 page  
1A, Current-Limited, High-Side
P-Channel Switch with Thermal Shutdown
____________________________Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
CURRENT-LIMIT RESPONSE
(RL = 0.6Ω)
CURRENT-LIMIT RESPONSE
(RL = 0.3Ω)
A 5V A 5V
B
C
0V, 0A
2µs/div
CIN = 100µF, COUT = 0.1µF
A: VIN, 1V/div, AC COUPLED
B
B: IOUT, 1A/div
C: VOUT, 2V/div
0A
C
0V
2µs/div
CIN = 100µF, COUT = 0.1µF
A: VIN, 1V/div, AC COUPLED
LOAD-TRANSIENT RESPONSE
B: IOUT, 5A/div
C: VOUT, 2V/div
A
0A
0V
B
SWITCH TURN-ON TIME
5ms/div
VIN = 5V
B: VOUT RIPPLE,
A: IOUT = 0mA TO 750mA,
200mV/div, AC COUPLED
0.5A/div
SWITCH TURN-OFF TIME
AA
0V
B
20µs/div
VIN = 5V, IOUT = ILIMIT
A: VON, 2V/div
B: VOUT, 2V/div
B
0V
VIN = 5V, IOUT = ILIMIT
A: VON, 2V/div
B: VOUT, 2V/div
2µs/div
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MAX890LESA.PDF ] | |
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