MAXIM MAX16129UAAGA+

The MAX16128/MAX16129 load-dump/reverse-voltage protection circuits protect power supplies from damaging input-voltage conditions, including overvoltage, reversevoltage, and high-voltage transient pulses. Using a built-in charge pump, the devices control two external back-to-back n-channel MOSFETs that turn off and isolate downstream power supplies during damaging input conditions, such as an automotive load-dump pulse or a reverse-battery condition. Operation is guaranteed down to 3V that ensures proper operation during automotive cold-crank conditions. These devices feature a flag output (FLAG) that asserts during fault conditions. For reverse-voltage protection, external back-to-back MOSFETs outperform the traditional reverse-battery diode, minimizing the voltage drop and power dissipation during normal operation. The devices use fixed overvoltage and undervoltage thresholds, minimizing the external component count. The MAX16129 provides limiter-mode fault management for overvoltage and thermal-shutdown conditions; whereas the MAX16128 provides switch-mode fault management for overvoltage and thermal shutdown conditions. In the limiter mode, the output voltage is limited and FLAG is asserted low during a fault. In the switch mode, the external MOSFETs are switched off and FLAG (overline) is asserted low after a fault. The switch mode is available in four options—Latch mode, 1 Autoretry mode, 3 Autoretry mode, and Always autoretry mode. The MAX16128/MAX16129 are available in an 8-pin μMAX package and operate over the automotive temperature range ( -40℃ to +125℃ ).

• Increases Protection of Sensitive Electronic Components in Harsh Environments
• -36V to +90V Wide Input-Voltage Protection Range
• Fast Gate Shutoff During Fault Conditions with Complete Load Isolation Thermal Shutdown Protection
• FLAG Output Identifies Fault Condition
• Automotive Qualified
• Operates Down to +3V, Riding Out Cold-Crank Conditions
• -40℃ to +125℃ Operating Temperature Range
• Integration Reduces Solution Size
• Internal Charge-Pump Circuit Enhances External n-Channel MOSFET
• Fixed Undervoltage/Overvoltage Thresholds
• 3mmx3mm, 8-Pin μMAX Package
• Reduced Power Dissipation Compared to Discrete Solutions
• Minimal Operating Voltage Drop for ReverseVoltage Protection
• 380μA Supply Current and 100μA Shutdown Current at 30V Input

• Automotive
• Industrial
• Telecom/Server/Networking