19-6257 Rev 0 3/12 EVALUATION KIT AVAILABLE MAX14626 High-Voltage Reverse-Input-Capable 420mA Current Loop Protector General Description Benefits and Features The MAX14626 current loop protector features a current- S High Performance limit switch to prevent damage to the sensor devices due Low On-Resistance 25I (typ) to faulty current loop conditions. The current-limit switch Accurate Q10% Current Limit features a 25I (typ) on-resistance and operates from a +2.3V to +40V Wide Supply Voltage Range +2.3V to +36V input voltage range. The accurate current Low Operating Current limit is set to 30mA, making the part ideal for protecting Ultra-Low Temperature Coefficient the sensor reading devices. S Robust Protection for Sensors The MAX14626 handles an overcurrent event in a con- Avoids Power Dissipation Issues Compared to tinuous current-limit mode. Additional safety features Discrete Solutions include thermal shutdown to prevent overheating and Thermal Shutdown reverse-input blocking to protect from being reverse con- nected into the sensor. Reverse Input Protection The device is available in a tiny 6-pin (3mm x 3mm), S Saves Space in Compact Systems TDFN exposed pad package and is specified over the Eliminates Need for Discrete PTC Poly Switch, -40NC to +85NC extended temperature range. Zener Diodes, and Resistors 3mm x 3mm, 6-Pin TDFN Package Applications Ordering Information appears at end of data sheet. Industrial Current Loop Control For related parts and recommended products to use with this part, refer to www.maxim-ic.com/MAX14626.related. Typical Operating Circuit 420mA CURRENT MAX14626 SENSOR IN OUT (420mA) CURRENT R IA ADC LOAD CONTROL AND REF SUPPLY CURRENT LIMIT PROTECTION GATE CONTROL GND Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX14626 High-Voltage Reverse-Input-Capable 420mA Current Loop Protector ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Operating Temperature Range ........................ -40NC to +125NC IN to GND ..............................................................-40V to +40V Maximum Junction Temperature .....................................+150NC OUT to GND ........................................................ -0.3V to +40V Storage Temperature Range ............................ -65NC to +150NC Current into IN ................................................ Internally Limited Lead Temperature (soldering, 10s) ................................+300NC Current into OUT ..............................................................100mA Soldering Temperature (reflow) ......................................+260NC Continuous Power Dissipation (T = +70NC) A TDFN (derate 23.8mW/NC above +70NC) ...............1904.8mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL CHARACTERISTICS (Note 1) TDFN Junction-to-Ambient Thermal Resistance (B ) ............. 42NC/W Junction-to-Case Thermal Resistance (B ) .................... 9NC/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four- layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. DC ELECTRICAL CHARACTERISTICS (I = 50FA to 24mA, T = -40NC to +85NC, R = 25I to 1kI, unless otherwise noted. Typical values are at I = 10mA, R IN A LOAD IN LOAD = 250I, and T = +25NC.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SUPPLY VOLTAGE Operating Start Voltage V I = 20FA 2.3 V IN ST IN Operating IN Voltage V 36 V IN Operating IN to OUT Drop I = 24mA 2.8 V IN Voltage Quiescent Current (Normal I R P 250I 40 56 FA Q LOAD Mode: 420mA) Quiescent Current (Current- I I = 30mA, V = 5V, R = 25I 65 FA Q OUT IN LOAD Limit Mode: Current > 25mA) Reverse Current I V = -36V, V = 0V, current into OUT 0.01 0.3 FA REV IN OUT IN to OUT Switch R V = 4V, I = 16mA 25 45 I ON IN OUT On-Resistance Forward Current Limit I V = 36V 27 30 33 mA LIM IN DYNAMIC V = 3V, time from V applied to IN IN Turn-On Time t 10 Fs SS V = 90% of V (Note 3) OUT IN Turn-Off Time t Time from thermal shutdown (Note 3) 20 Fs OFF Input current source from 20mA to 50mA Current-Limit Reaction Time t 50 Fs LIM (Note 4) Current-Limit Overshoot Voltage Input current source from 0mA to 50mA 50 % 2mA P DC I P 24mA, DI = 1mA at IN IN P-P Input Small Signal Bandwidth BW > 10 kHz 1kI Maxim Integrated Products 2