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PDF MAX14523A Data sheet ( Hoja de datos )
| Número de pieza | MAX14523A | |
| Descripción | Adjustable Current-Limit Switches | |
| Fabricantes | Maxim Integrated Products | |
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19-4814; Rev 0; 7/09
www.DataSheet4U.com
250mA to 1.5A, Adjustable
Current-Limit Switches
General Description
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
programmable current-limit switches feature internal
current limiting to prevent damage to host devices due
to faulty load conditions. These current-limit switches
feature a low 70mΩ on-resistance and operate from a
+1.7V to +5.5V input voltage range. The current limit is
adjustable from 250mA to 1.5A, making these devices
ideal for SDIO (secure digital input/output) and other
load-switching applications.
Each device in the family handles an overcurrent event
differently depending on the option selected. The
MAX14523A/MAX14523AL go into an autoretry mode,
the MAX14523B latches off the switch, and the
MAX14523C features a continuous current-limit mode.
Additional safety features include thermal shutdown to
prevent overheating and reverse-current blocking to
prevent current from being driven back into the source.
The MAX14523A/MAX14523AL/MAX14523B/MAX14523C
are available in a tiny 8-pin, 3mm x 3mm, TDFN pack-
age and operate over the -40°C to +125°C automotive
temperature range.
Applications
SDIO Ports
USB Ports
Notebook VGA Ports
GPS
Cell Phones
MP3 Players
UTCA/ATCA Platforms
Pin Configuration appears at end of data sheet.
Features
♦ Accurate (±10%) Overload Current Limit
♦ Adjustable Current-Limit Threshold
♦ Low-Dropout Voltage (70mV at 1A Load Current)
♦ Short-Circuit Protection
♦ Thermal-Shutdown Protection
♦ Reverse-Current Protection
♦ 170µA (typ) Supply Current
♦ Shutdown Reverse Current, 0.6µA (max)
♦ +1.7V to +5.5V Supply Voltage Range
♦ Tiny 8-Pin, 3mm x 3mm, TDFN Package
Typical Operating Circuit
POWER
SUPPLY
IN
1μF
RSETI
μP
VPULLUP
10kΩ
FLAG
ON(ON)*
BIAS
VOLTAGE
CHARGE
PUMP
OUT
1μF
LOAD
CURRENT
REFERENCE
CONTROL
LOGIC
N.C.
MAX14523A
MAX14523AL
MAX14523B
MAX14523C
GND
*ON FOR THE MAX14523AL ONLY.
Ordering Information/Selector Guide
PART
PIN-PACKAGE
TOP MARK
ON POLARTIY
MAX14523AATA+
8 TDFN-EP*
BLO
Active-High
MAX14523ALATA+**
8 TDFN-EP*
BLP
Active-Low
MAX14523BATA+
8 TDFN-EP*
BLQ
Active-High
MAX14523CATA+
8 TDFN-EP*
BLS
Active-High
Note: All devices are specified over the -40°C to +125°C operating temperature range.
+Denotes a lead(Pb)-free package/RoHs-compliant package.
*EP = Exposed pad.
**Future product—contact factory for availability.
OVERCURRENT RESPONSE
Autoretry
Autoretry
Latch-Off
Continuous
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
www.DataSheet4U.com
250mA to 1.5A, Adjustable
Current-Limit Switches
Typical Operating Characteristics
(VIN = +3.3V, CIN = 1µF, COUT = 1µF, RSETI = 94.2kΩ, TA = +25°C, unless otherwise noted.)
CURRENT LIMIT vs. SUPPLY VOLTAGE
1.60
NORMALIZED CURRENT LIMIT
vs. TEMPERATURE
1.10
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
300
1.55 1.05 250
1.50 1.00 200
1.45 0.95 150
1.40
1.70
2.65 3.60 4.55
SUPPLY VOLTAGE (V)
5.50
0.90
-40
-7 26 59 92
TEMPERATURE (°C)
125
100
1.70
2.65 3.60 4.55
SUPPLY VOLTAGE (V)
5.50
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
300
250
VIN = +5V
200
150
100
-40
VIN = +3.3V
-7 26 59 92
TEMPERATURE (°C)
125
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
10
VON = 0V
9
8
7
6
5
VIN = +5V
4
3
2 VIN = +3.3V
1
0
-40
-7 26 59 92
TEMPERATURE (°C)
125
SHUTDOWN FORWARD CURRENT
vs. TEMPERATURE
10
VON = 0V, VOUT = 0V
9
8
7
6
5 VIN = +5.5V
4
3
2 VIN = +1.7V
1
0
-40
-7 26 59 92
TEMPERATURE (°C)
125
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX14523A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MAX14523A | Adjustable Current-Limit Switches | Maxim Integrated Products |
| MAX14523AL | Adjustable Current-Limit Switches | Maxim Integrated Products |
| MAX14523B | Adjustable Current-Limit Switches | Maxim Integrated Products |
| MAX14523C | Adjustable Current-Limit Switches | Maxim Integrated Products |
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