MAX1538ETI+T

Overview

The MAX1538ETI+T is a power path controller designed for dual-battery portable systems. It manages power selection between an AC adapter and two batteries based on connection status and voltage levels. The device features fast analog switching with make-before-break timing to support hot-swappable battery packs. It includes built-in monitoring for low battery conditions and adapter presence, reducing microprocessor firmware complexity. The component operates within a 4.75V to 28V input range and utilizes a compact 28-pin TQFN package.

Feature Summary

• Automated power source selection between AC adapters and dual batteries
• Fast make-before-break switching enables safe hot-swapping of battery packs
• Integrated analog comparators monitor battery voltage and adapter presence
• Supports battery capacity rebuild mode for optimized energy utilization

Applications

• Dual-battery portable electronic devices
• Laptops and subnotebooks
• Network browsers
• Aviation system power supplies

Procurement Notes

Verify the specific suffix ETJ versus ETI regarding package dimensions and thermal characteristics before procurement. Confirm RoHS compliance status through official manufacturer documentation. Check current availability as distribution channels may list limited stock or obsolete status. Ensure the selected variant matches the required PCB footprint and pin configuration for the target design.

Selection Notes

Select this component for applications requiring independent power management without heavy microprocessor intervention. It is suitable for systems needing seamless transition between multiple power sources. Consider the 28-pin TQFN form factor for space-constrained designs. Verify compatibility with external P-channel MOSFETs for optimal drive performance.

Part Context

This part belongs to the Maxim Integrated power management portfolio, specifically targeting portable electronics. It simplifies system architecture by handling power routing logic internally. The device reduces the burden on the main processor, allowing it to enter standby modes more frequently. It represents a specialized solution for complex multi-source power environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.