250mA to 1.5A, Adjustable Current-Limit Switches

Industry's Highest Accuracy, Adjustable, 1.5A Current-Limit Switch

Please check latest availability status for a specific part variant.


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 package and operate over the -40°C to +125°C automotive temperature range.
MAX14523A, MAX14523AL, MAX14523B, MAX14523C: Typical Operating Circuit MAX14523A, MAX14523AL, MAX14523B, MAX14523C: Typical Operating Circuit Enlarge+

Key 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


  • Cell Phones
  • GPS
  • MP3 Players
  • Notebook VGA Ports
  • SDIO Ports
  • USB Ports
  • UTCA/ATCA Platforms

See parametric specs for Current Limit and USB Power Switches (80)

Part NumberUSBPower SwitchesCurrent Limit
Current Limit
Fault IndicatorCurrent Limit Accuracy
Current Limit Set ByLowest Adj. Setting
Oper. Temp.
minmaxtypminmaxSee Notes
MAX14523A Yes12501500Yes10Resistor0. to +125
$2.29 @1k
$1.73 @1k
$2.29 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: MAX14523B 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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