MAX14523A_11 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 250mA to 1.5A, Adjustable Current-Limit Switches

19-4814; Rev 1; 1/11
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)*
*ON FOR THE MAX14523AL ONLY.
BIAS
VOLTAGE
CHARGE
PUMP
OUT
1μF
LOAD
CURRENT
REFERENCE
CONTROL
LOGIC
N.C.
MAX14523A
MAX14523AL
MAX14523B
GND
MAX14523C
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
MAX14523BATA/V+T
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.
/V denotes an automotive qualified part.
*EP = Exposed pad.
**Future product—contact factory for availability.
OVERCURRENT RESPONSE
Autoretry
Autoretry
Latch-Off
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.