250mA to 1.5A, Adjustable Current-Limit Switches

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.

Applications

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

* 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