MAX4845EYT+T

Specialized ICS Overview

The MAX4845EYT+T is an overvoltage protection controller designed to safeguard low-voltage systems against high-voltage faults up to 28V. It features a preset overvoltage trip level of 5.8V and an undervoltage lockout (UVLO) threshold of 4.15V. The device incorporates an internal charge pump to drive external n-channel MOSFETs, eliminating the need for external capacitors. Input voltage ranges from 1.2V to 28V, with standby current dropping to 10µA during UVLO conditions. It operates within a temperature range of -40°C to +85°C.

Specialized ICS Feature Summary

• Preset 5.8V overvoltage trip level with 55mV hysteresis
• Internal charge pump drives external n-channel MOSFETs
• Low 10µA standby current during undervoltage lockout
• Open-drain FLAG output indicates fault conditions

Specialized ICS Applications

• Cell Phones
• Digital Cameras
• Media Players

Specialized ICS Procurement Notes

Verify the package type matches the required design footprint, as this component is available in both µDFN and UTLGA variants. Confirm the specific UVLO threshold requirements, as other versions in the series offer different lockout levels. Ensure the input voltage range aligns with the system's operational limits before procurement.

Specialized ICS Selection Notes

Select the MAX4845EYT+T when a fixed 5.8V overvoltage threshold is required. The UTLGA package is suitable for space-constrained designs. Verify that the external MOSFET selected has a V_DS rating of at least 30V to withstand the maximum input voltage. Consider the back-to-back MOSFET configuration if reverse current leakage prevention is necessary.

Specialized ICS Part Context

This part belongs to the MAX4843–MAX4846 family of overvoltage protection controllers. The suffix 'E' denotes the industrial temperature grade (-40°C to +85°C), 'Y' indicates the 6-pin Ultra-Thin LGA package, and '+T' signifies lead-free/RoHS compliance in tape-and-reel packaging. Other family members include MAX4843, MAX4844, and MAX4846 with different trip levels.

Specialized ICS Replacement Considerations

Direct replacements within the same package and function include MAX4845ELT+T (µDFN package) or MAX4845CEYT+T/MAX4845DEYT+T if a lower 2.2V UVLO threshold is acceptable. Ensure pin compatibility and thermal characteristics match the original design constraints.