MAX4845CEYT+

Specialized ICS Overview

The MAX4845CEYT+T is an overvoltage protection controller from the MAX4843–MAX4846 series, 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 2.2V. The device utilizes an internal charge pump to drive external n-channel MOSFETs, eliminating the need for external capacitors. It operates within a temperature range of -40°C to +85°C and is housed in a 6-pin ultra-thin LGA package measuring 1.5mm x 1.0mm.

Specialized ICS Feature Summary

• Overvoltage protection up to 28V with a fixed 5.8V trip level
• Low standby current of 10µA when input voltage drops below UVLO
• Internal charge pump drives external n-channel FETs without external capacitors
• Open-drain FLAG output indicates fault conditions

Specialized ICS Applications

• Cell Phones
• Digital Still Cameras
• PDAs and Palmtop Devices
• MP3 Players

Specialized ICS Procurement Notes

Verify the specific suffix 'C' corresponds to the 2.2V UVLO threshold as defined in the ordering information table. Confirm the '+T' designation indicates tape and reel packaging. Ensure the component matches the 6-pin ultra-thin LGA physical dimensions specified in the datasheet.

Specialized ICS Selection Notes

Select this part when a 5.8V overvoltage threshold is required. The 'C' variant is appropriate for applications needing a lower 2.2V UVLO threshold compared to the standard 4.15V found in other MAX4845 variants. Ensure the external MOSFET selected has a V_DS rating of at least 30V to withstand the full input range.

Specialized ICS Part Context

This component belongs to the MAX4843–MAX4846 family of overvoltage protection controllers. The MAX4845CEYT+T specifically differentiates itself by offering a 2.2V UVLO threshold, whereas the MAX4845ELT offers 4.15V. All devices in the series share similar functionality but vary in their preset trip levels and UVLO thresholds.

Specialized ICS Replacement Considerations

The MAX4845EYT+T serves as a direct functional substitute if a 4.15V UVLO threshold is acceptable instead of 2.2V. Other members of the MAX4843–MAX4846 series may be considered if different overvoltage trip levels are required.