High-Voltage Reverse-Input-Capable 4–20mA Current Loop Protector

The MAX14626 current loop protector features a current-limit switch to prevent damage to the analog input module from sensor failure. The current-limit switch features a 25Ω (typ) on-resistance and operates from a +2.3V to +36V input voltage range. The accurate current limit is set to 30mA, making the part ideal for protecting the sensor reading devices.

The MAX14626 handles an overcurrent event in a continuous current-limit mode. Additional safety features include thermal shutdown to prevent overheating and reverse-input blocking to protect from being reverse connected into the sensor.

The device is available in a tiny 6-pin (3mm x 3mm), TDFN exposed pad package and is specified over the -40°C to +85°C extended temperature range.

Applications

* Industrial Current Loop Control

* High Performance

* Low On-Resistance 25Ω (typ)

* Accurate ±10% Current Limit

* +2.3V to +40V Wide Supply Voltage Range

* Low Operating Current

* Ultra-Low Temperature Coefficient

* Robust Protection for Sensors

* Avoids Power Dissipation Issues Compared to Discrete Solutions

* Thermal Shutdown

* Reverse Input Protection

* Saves Space in Compact Systems

* Eliminates Need for Discrete PTC Poly Switch, Zener Diodes, and Resistors

* 3mm x 3mm, 6-Pin TDFN Package