MAX1809EEE+

Overview

The MAX1809EEE+ is a synchronous step-down DC-DC converter designed for DDR memory active termination. It operates with an input voltage range of 3V to 5.5V and provides an adjustable output from 1.1V to 5.5V at up to 3A. The device features a 1MHz switching frequency and utilizes a QSOP-16 package. It supports bidirectional current flow, allowing it to source or sink current as required by the load.

Feature Summary

• Synchronous step-down topology optimized for DDR termination
• Bidirectional current capability for sourcing and sinking loads
• Constant-off-time control architecture

Applications

• DDR memory active termination supplies
• Low-voltage point-of-load conversion
• System power management for high-speed digital interfaces

Procurement Notes

Verify the specific suffix EEE against official Analog Devices documentation to confirm package type and temperature rating. Confirm RoHS compliance status through the manufacturer's current datasheet. Check for obsolescence notices or lifecycle changes directly from the supplier before finalizing procurement plans.

Selection Notes

Select this component when designing DDR termination circuits requiring bidirectional current handling. Ensure the input voltage stays within the 3V to 5.5V range. Verify that the thermal performance of the QSOP-16 package meets the system requirements for the expected load current and ambient temperature conditions.

Part Context

This part belongs to the Maxim Integrated line of power management ICs, now under Analog Devices. It is specifically engineered for memory interface applications, distinguishing itself from general-purpose regulators by its focus on bidirectional operation and fast transient response needed for dynamic memory loads.

Replacement Considerations

Consult official Analog Devices substitution guides for verified equivalents. Generic buck converters may lack the specific bidirectional current capabilities required for DDR termination applications.