MAX16126TCA/VY+

Overview

The MAX16126TCA/VY+ is an automotive-grade supervisory circuit designed for load-dump and reverse-voltage protection. It operates within a supply voltage range of 3V to 30V and features a threshold voltage of 1.225V with an overvoltage threshold of 1.25V. The device utilizes a built-in charge pump to control external N-channel MOSFETs, providing isolation during harmful input events. It offers an active-low, open-drain output with a reset delay time of 150µs. The component supports manual reset functionality and operates across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a charge pump to drive external back-to-back N-channel MOSFETs for robust power path isolation
• Provides automatic disconnection during load-dump pulses and reverse battery conditions
• Features an active-low, open-drain status output for system monitoring

Applications

• Automotive load-dump protection circuits
• Reverse voltage protection in vehicle power systems
• Downstream power rail isolation in automotive electronics

Procurement Notes

Verify the specific suffix 'VY' indicates AEC-Q100 automotive qualification when sourcing. Confirm package details match the TQFN-12 specification. Ensure compatibility with external MOSFET selection based on the internal charge pump capabilities. Check current availability status as distribution may vary by region.

Selection Notes

Select this component for applications requiring high-voltage tolerance up to 90V withstand capability. It is suitable for systems needing precise threshold monitoring at 1.225V. Consider the 224µA supply current for low-power standby requirements. Ensure the design accommodates the 12-TQFN (3x3) footprint and exposed pad thermal requirements.

Part Context

This part belongs to the MAX16126/MAX16127 series from Analog Devices/Maxim Integrated. It is specifically engineered for harsh automotive environments where transient voltage spikes are common. The device serves as a critical interface between the vehicle power bus and sensitive downstream loads, ensuring system integrity during fault conditions.

Replacement Considerations

Direct substitutes include MAX16126TCA+T and MAX16126TCB+T. Verify pinout and electrical specifications against the original datasheet before substitution.