MAX1808EUB+T

Overview

The MAX1808EUB+T is a micropower adjustable overvoltage protection controller designed for notebook displays and power supplies. It operates within a wide input voltage range, supporting high-side monitoring of supply rails. The device features an internal reference and comparator to detect overvoltage conditions with high accuracy. It includes a delay timer to prevent false triggering from transient spikes. The output drives an external N-channel MOSFET to disconnect the load during fault conditions. Packaged in a 10-pin UMAX/USOP surface-mount package, it ensures reliable system protection.

Feature Summary

• Adjustable overvoltage threshold detection for precise rail monitoring
• Programmable delay timer to filter out transient noise and prevent nuisance tripping
• Micropower operation suitable for battery-powered and energy-efficient applications
• Direct drive capability for external N-channel MOSFETs to isolate faulty loads

Applications

• Notebook display backlight power supply protection
• General-purpose DC-DC converter overvoltage protection
• Portable electronic device power management systems
• Server and workstation power distribution units

Procurement Notes

Verify the specific suffix and tape/reel configuration when ordering. Confirm RoHS compliance status through official manufacturer documentation. Check for obsolescence notices or lifecycle changes prior to final design approval. Ensure compatibility with existing PCB footprints for the 10-USOP package. Validate supply chain authenticity through authorized distributors only.

Selection Notes

Select this component when precise overvoltage monitoring with low quiescent current is required. Consider the adjustable threshold range to match the specific supply rail being protected. Evaluate the external MOSFET selection based on the controller's drive strength and switching speed requirements. Ensure the operating temperature range meets the environmental specifications of the target application.

Part Context

Part of the Maxim Integrated power management portfolio, the MAX1808 series focuses on protecting sensitive loads from excessive voltage. It complements other PMIC components by providing dedicated fault protection rather than active regulation. The family is commonly integrated into complex power trees for mobile computing devices where space and efficiency are critical constraints.

Replacement Considerations

Check for direct pin-compatible alternatives within the MAX1808 family. Verify if newer generations offer improved accuracy or lower standby currents. Ensure substitute parts maintain the same package outline dimensions for board reuse. Confirm that any replacement supports the required input voltage range and delay timing characteristics.