MAX4844ELT+T

Specialized ICS Overview

The MAX4844ELT+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 6.35V 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. It operates within a supply voltage range of 1.2V to 28V and consumes 10µA in standby mode when below the UVLO threshold. The component is housed in a compact 6-pin µDFN package measuring 1.5mm x 1.0mm.

Specialized ICS Feature Summary

• Preset 6.35V overvoltage trip level with 65mV 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 specific ordering suffix ELT corresponds to the 6-pin µDFN package configuration. Confirm that the +T designation indicates tape and reel packaging. Ensure compatibility with the required input voltage range and external MOSFET selection for the target application.

Specialized ICS Selection Notes

Select this model for applications requiring a fixed 6.35V overvoltage threshold. The internal charge pump simplifies design by removing external bootstrap components. Ensure the external n-channel MOSFET has a VDS rating of at least 30V to withstand the maximum 28V input. Consider back-to-back MOSFET configurations if reverse current leakage prevention is necessary.

Specialized ICS Part Context

This component belongs to the MAX4843–MAX4846 family of overvoltage protection controllers. The MAX4844 variant is distinguished by its 6.35V overvoltage trip level, whereas other models in the series offer thresholds of 7.4V, 5.8V, or 4.65V. All devices share similar functional characteristics, including the internal charge pump and low standby current capabilities.

Specialized ICS Replacement Considerations

Direct replacements within the same family include the MAX4843ELT (7.4V threshold), MAX4845ELT (5.8V threshold), and MAX4846ELT (4.65V threshold). These parts share identical pinouts and package dimensions but differ in their overvoltage trip levels.