Analog Devices / Maxim Integrated MAX16126 / MAX16127 Protection Circuits
Analog Devices MAX16126 / MAX16127 Protection Circuits protect power supplies from damaging input voltage conditions, including overvoltage, reverse-voltage, and high-voltage transient pulses. Using a built-in charge pump, these 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 to ensure proper operation during automotive cold-crank conditions.
MAX16126 / MAX16127 protection circuits feature a flag output 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 MAX16127 provides limiter-mode fault management for overvoltage and thermal shutdown conditions while the MAX16126 provides switch-mode fault management for overvoltage and thermal shutdown conditions. These Analog Devices modules operate over the automotive temperature range (-40°C to +125°C) and are ideal for use in automotive, industrial, and avionics applications.
Features
- Quick and simple protection from all ISO7637 conditions
- Operate down to +3V, riding out cold-crank conditions
- -30V to +90V Wide input voltage range
- Minimal operating voltage drop reverse-voltage protection
- Fast gate shutoff during fault conditions with complete load isolation
- Adjustable undervoltage/overvoltage thresholds
- Thermal shutdown protection
- Low supply current and low shutdown current
- Internal charge-pump circuit ensures 7V (typ) gate-to-source enhancement
- Active-low FLAG output identifies fault condition
- Automotive qualified
- -40°C to +125°C Operating temperature range
Applications
- Automotive
- Avionics
- Industrial
- Telecom/server/networking
Additional Resources
Published: 2012-03-29
| Updated: 2023-04-18