EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX16126/MAX16127 Load-Dump/Reverse-Voltage Protection Circuits General Description Benefits and Features The MAX16126/MAX16127 load-dump/reverse-voltage Increases Protection of Sensitive Electronic protection circuits protect power supplies from damaging Components in Harsh Environments input voltage conditions, including overvoltage, reverse- -36V to +90V Wide Input-Voltage Protection Range voltage, and high-voltage transient pulses. Using a Fast Gate Shutoff During Fault Conditions with built-in charge pump, the devices control two external Complete Load Isolation Thermal-Shutdown Protection back-to-back n-channel MOSFETs that turn off and isolate downstream power supplies during damaging Active-Low FLAG Output Identifies Fault Condition input conditions, such as an automotive load-dump pulse AEC-Q100 Automotive Qualified or a reverse-battery condition. Operation is guaranteed Operates Down to +3V, Riding Out Cold-Crank down to 3V to ensure proper operation during automotive Conditions cold-crank conditions. These devices feature a flag output -40C to +125C Operating Temperature Range (FLAG) that asserts during fault conditions. Integration Reduces Solution Size For reverse-voltage protection, external back-to-back Internal Charge-Pump Circuit Enhances External MOSFETs outperform the traditional reverse-battery n-Channel MOSFET diode, minimizing the voltage drop and power dissipation Adjustable Undervoltage/Overvoltage Thresholds during normal operation. 3mm x 3mm, 12-Pin TQFN Package The MAX16126/MAX16127 use external resistors to Reduced Power Dissipation Compared to Discrete adjust the overvoltage and undervoltage comparator Solutions thresholds for maximum flexibility. Minimal Operating Voltage Drop for Reverse- Voltage Protection The MAX16127 provides limiter-mode fault management 350A (max) Supply Current and 100A (max) for overvoltage and thermal shutdown conditions whereas Shutdown Current at 30V Input the MAX16126 provides switch-mode fault management for overvoltage and thermal shutdown conditions. In the Applications limiter mode, the output voltage is limited and FLAG is Automotive asserted low during a fault. In the switch mode, the external Industrial MOSFETs are switched off and FLAG is asserted low after a fault. The switch mode is available in four options: Avionics latch mode, 1 autoretry mode, 3 autoretry mode, and Telecom/Server/Networking always autoretry mode. The MAX16126/MAX16127 are available in 12-pin TQFN packages. These devices operate over the automotive temperature range (-40C to +125C). Ordering Information appears at end of data sheet. 19-6053 Rev 14 11/19MAX16126/MAX16127 Load-Dump/Reverse-Voltage Protection Circuits Absolute Maximum Ratings (All pins referenced to GND.) Continuous Sink/Source (all pins) ..................................100mA IN ............................................................................-36V to +90V Continuous Power Dissipation (T = +70C) (multilayer board) A SHDN ...........................................-0.3V to max (0V, V + 0.3V) TQFN (derate 14.7mW/C above +70C)...............1176.5mW IN TERM ...........................................-0.3V to max (0V, V + 0.3V) Operating Temperature Range ......................... -40C to +125C IN SRC, GATE ............................................................-36V to +45V Junction Temperature ......................................................+150C SRC to GATE .........................................................-36V to +36V Storage Temperature Range ............................ -60C to +150C OUT .......................................................................-0.3V to +45V Lead Temperature (soldering, 10s) .................................+300C FLAG .....................................................................-0.3V to +45V Soldering Temperature (reflow) .......................................+260C OVSET, UVSET .......................................................-0.3V to +6V 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. Package Thermal Characteristics (Note 1) TQFN Junction-to-Ambient Thermal Resistance ( ) .....46.91C/W JA Junction-to-Case Thermal Resistance ( ) ............5.27C/W 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.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = 12V, C = 1nF, T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C.) (Note 2) IN GATE-SOURCE A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating range 3 30 Input Voltage Range V V IN Protection range -36 +90 V = V = IN SRC 224 360 V = 12V OUT SHDN = high V = V = IN SRC 260 400 Input Supply Current I A IN V = 30V OUT V = 12V 34 60 IN SHDN = low V = 30V 64 100 IN V = V = 12V, SHDN = high 136 200 SRC IN SRC Input Current I A SRC V = V = 30V, SHDN = high 240 350 SRC IN IN Undervoltage Lockout V V rising 2.92 V UVLO IN OVSET/UVSET Input Current I 100 nA UVSET/OVSET OVSET/UVSET Threshold (Rising) V V rising 1.2 1.225 1.25 V TH IN 0.05 x OVSET/UVSET Threshold Hysteresis V V TH-HYS V TH 0.9 x POK Threshold Rising V V POK+ V IN 0.87 x POK Threshold Falling V V POK- V IN TERM On-Resistance R 0.7 1.2 k TERM Maxim Integrated 2 www.maximintegrated.com