EVALUATION KIT AVAILABLE MAX14571/MAX14572/ Adjustable Overvoltage and Overcurrent MAX14573 Protectors with High Accuracy Benefits and Features General Description Integrated Protection Increases System Reliability The MAX14571/MAX14572/MAX14573 adjustable over- voltage and overcurrent-protection devices are ideal to Adjustable OVLO and UVLO Thresholds protect systems against positive and negative input volt- (3% Accurate Preset Thresholds) age faults up to 40V and feature low 100m(typ) R ON Automatic Internal and External Selection FETs. Programmable Forward Current Limit (Adjustable Up The overvoltage-protector (OVP) feature protects volt- to 4.2A) with 15% Accuracy ages between 6V and 36V, while the undervoltage-protector Thermal-Shutdown Protection (UVP) feature protects voltages between 4.5V and 24V. The overvoltage-lockout (OVLO) and undervoltage-lockout 100m (typ) On-Resistance FET (UVLO) thresholds are set using optional external resistors. Special Features Facilitate Designs for Industrial The factory-preset internal OVLO threshold is 33V (typ) and Applications the preset internal UVLO threshold is 19.2V (typ). Wide 4.5V to 36V Operating Input Range The ICs also feature programmable current-limit protec- tion up to 4.2A. Once current reaches the threshold, Reverse-Current Flow Option for Inductive Loads the MAX14571 turns off after the 20.7ms (typ) blanking Independent Microprocessor Enable Input (EN) and time and stays off during the retry period. The MAX14572 High-Voltage-Capable Input (HVEN) latches off after the blanking time, and the MAX14573 limits the current continuously. In addition, these devices feature Applications reverse current and thermal-shutdown protection. Industrial Equipment The ICs are available in a small 14-pin TSSOP (5mm Consumer Electronics x 6.5mm) package and are specified over the extended Marine Equipment -40C to +85C temperature range. Battery-Powered Applications Ordering Information appears at end of data sheet. Typical Operating Circuit V IN OUT POWER C C IN OUT IN OUT IN OUT V PULLUP SYSTEM R3 R1 MAX14571 SYSTEM MAX14572 INPUT MAX14573 UVLO FLAG OVLO EN RIEN SETI HVEN R4 R2 GND NOTE: R1, R2, R3, AND R4 ARE ONLY REQUIRED FOR ADJUSTABLE OVLO/UVLO OTHERWISE, CONNECT UVLO/OVLO TO GND. 19-6470 Rev 4 7/17MAX14571/MAX14572/ Adjustable Overvoltage and Overcurrent MAX14573 Protectors with High Accuracy Absolute Maximum Ratings (All voltages referenced to GND.) Continuous Power Dissipation (T = +70NC) A IN, HVEN ................................................................-40V to +40V TSSOP (derate 25.6mW/NC above +70NC) ......2051.3mW IN to OUT ...............................................................-40V to +40V Operating Temperature Range ........................... -40NC to +85NC OUT ......................................................................-0.3V to +40V Junction Temperature .........................................+150NC OVLO, UVLO, FLAG, EN, RIEN...........................-0.3V to +6.0V Storage Temperature Range ............................ -65NC to +150NC Current into IN (DC Operating) (Note 1) .............4.2A Lead Temperature (soldering, 10s) ...................+300NC SETI...........................-0.3V to Min (V , 1.22V) + 0.3V IN Soldering Temperature (reflow) .........................+260NC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation 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. Note 1: DC current is also limited by the thermal design of the system. Package Information PACKAGE TYPE: 14 TSSOP Package Code U14E+3 Outline Number 21-0108 Land Pattern Number 90-0119 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) +39C/W JA Junction to Case ( ) +3C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. 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.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = 4.5V to 36V, T = -40NC to +85NC, unless otherwise noted. Typical values are at V = 24V, R = 12kI, T = +25C.) (Note 2) IN A IN A SETI PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS IN Voltage Range V 4.5 36 V IN Shutdown Input Current I V = 0V, V = 5V 15 FA SHDN EN HVEN Shutdown Output Current I V = 0V 2 FA OFF OUT Reverse Input Current I V = -40V, V = V = 0V -35 FA IN RVS IN OUT GND Supply Current I V = 15V, R = 12kI 490 700 FA IN IN ISET V rising 32 33 34 IN Internal Overvoltage Trip Level V V OVLO V falling 32 IN V falling 17.5 18.5 19.5 IN Internal Undervoltage Trip Level V V UVLO V rising 18.2 19.2 20.2 IN Overvoltage-Lockout Hysteresis % of typical OVLO 3 % Maxim Integrated 2 www.maximintegrated.com