MAX1821EUB-T

Overview

The MAX1821EUB-T is a synchronous buck DC/DC converter designed for WCDMA power amplifier applications. It operates with an input voltage range of 2.6V to 5.5V and provides a single adjustable output from 400mV to 3.4V at up to 600mA. The device integrates a 1MHz switching frequency and functions within a -40°C to +85°C temperature range. Packaged in a 10-pin uMAX or uSOP, it serves as a compact voltage regulator IC for mobile communication systems.

Feature Summary

• Synchronous step-down topology for high efficiency
• Integrated 1MHz switching frequency
• Adjustable output voltage capability
• Designed for WCDMA power amplifier biasing

Applications

• WCDMA power amplifier supply
• Mobile phone bias circuits
• Portable communication devices

Procurement Notes

Verify the specific suffix (T vs +T) against the manufacturer's official documentation to ensure correct packaging and compliance status. Confirm availability through authorized distributors as this component may have limited stock or obsolescence risks. Cross-reference the exact part number with the latest datasheet revision to validate pinout and electrical specifications before procurement.

Selection Notes

Select this component when a compact, efficient buck regulator is required for WCDMA PA biasing. Ensure the input voltage stays within the 2.6V to 5.5V range. Verify that the 600mA output current meets the load requirements. Consider the 10-pin package size constraints for the PCB layout.

Part Context

This part belongs to the Maxim Integrated line of RF power management solutions. It is specifically engineered for the demanding requirements of third-generation wireless standards. The synchronous design distinguishes it from non-synchronous alternatives by offering improved efficiency and reduced heat dissipation in space-constrained mobile devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.