Datasheet MAX16126, MAX16127 (Analog Devices)

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Load-Dump/Reverse-Voltage Protection MAX16126/MAX16127 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 back-to-back n-channel MOSFETs that turn off and • Thermal-Shutdown Protection 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 • -40°C to +125°C 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- The MAX16127 provides limiter-mode fault management Voltage Protection for overvoltage and thermal shutdown conditions; whereas • 350μA (max) Supply Current and 100μA (max) the MAX16126 provides switch-mode fault management Shutdown Current at 30V Input for overvoltage and thermal shutdown conditions. In the ● Enables Functional Safety at System Level limiter mode, the output voltage is limited and FLAG is asserted low during a fault. In the switch mode, the external
Applications
MOSFETs are switched off and FLAG is asserted low ● Automotive after a fault. The switch mode is available in four options: ● Industrial latch mode, 1 autoretry mode, 3 autoretry mode, and always autoretry mode. ● Avionics The MAX16126/MAX16127 are available in 12-pin TQFN ● Telecom/Server/Networking packages. These devices operate over the automotive temperature range (-40°C to +125°C).
Ordering Information appears at end of data sheet.
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