MAX4959ELB+T

Specialized ICS Overview

The MAX4959ELB+T is an overvoltage protection controller designed to safeguard low-voltage systems from high-voltage faults up to +28V. It operates within a supply voltage range of 4V to 28V and features adjustable overvoltage lockout (OVLO) and undervoltage lockout (UVLO) thresholds via external resistors, with typical hysteresis of 1%. The device controls an external pFET to disconnect the load during fault conditions and includes a battery switching function for seamless power transition. Key electrical characteristics include a typical supply current of 100µA, ±15kV HBM ESD protection on the input, and a 25ms input debounce timer. It is housed in a compact 10-µDFN (2x2 mm) surface-mount package.

Specialized ICS Feature Summary

• Provides overvoltage protection up to +28V with externally adjustable OVLO/UVLO thresholds.
• Integrates battery switching control for automatic transition to backup power upon adapter removal.
• Features 25ms input debounce and blanking times to filter transient noise.
• Offers ±15kV HBM ESD protection on the input pin.

Specialized ICS Applications

• Laptops
• Portable computers
• Cameras
• Ultra-mobile PCs

Specialized ICS Procurement Notes

Verify the component type as an Overvoltage Protection Controller when sourcing. Confirm the package is 10-µDFN (2x2 mm) and the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the part number suffix matches the specific reel or cut tape configuration required for assembly.

Specialized ICS Selection Notes

Select this controller for applications requiring robust protection against high-voltage transients and automatic battery switchover. The adjustable thresholds allow customization for various system voltage levels. Consider the 100µA quiescent current for battery-powered designs and the small footprint for space-constrained PCB layouts.

Specialized ICS Part Context

This component belongs to the Maxim Integrated line of power management ICs, specifically focusing on system protection. It addresses the need for reliable power integrity in portable electronics by preventing damage from incorrect adapters or voltage spikes while maintaining continuous operation through battery backup.

Specialized ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs if considering alternative overvoltage protection controllers from other manufacturers.