MAX14626
MAX14626 is High-Voltage Reverse-Input-Capable manufactured by Maxim Integrated.
Description
The MAX14626 current loop protector features a currentlimit switch to prevent damage to the sensor devices due to faulty current loop conditions. 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 30m A, 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
Benefits and Features
- - 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 pared to Discrete Solutions
- Thermal Shutdown
- Reverse Input Protection
- - Saves Space in pact Systems
- Eliminates Need for Discrete PTC Poly Switch, Zener Diodes, and Resistors
- 3mm x 3mm, 6-Pin TDFN Package
Ordering Information appears at end of data sheet.
Typical Operating Circuit
SENSOR (4- 20m A) CURRENT
4- 20m A CURRENT
REF SUPPLY
CONTROL AND PROTECTION
CURRENT LIMIT GATE CONTROL
RLOAD
IA ADC
19-6257; Rev 1; 9/17
High-Voltage Reverse-Input-Capable 4- 20m A Current Loop Protector
Absolute Maximum Ratings
(All voltages referenced to GND.) IN to GND -40V to +40V OUT to GND -0.3V to +40V Current into IN Internally Limited Current into OUT...
