MAX1821XEBC

Overview

The MAX1821XEBC is a fixed-output buck regulator optimized for WCDMA power amplifier applications. It operates with an input voltage range of 2.6 V to 5.5 V and delivers up to 600 mA output current. The device features a 1.2 MHz switching frequency and includes programmable soft-start and shutdown capabilities. It is housed in a compact 3 mm x 4 mm UCSP package.

Feature Summary

• Optimized for powering power amplifiers in WCDMA handsets
• Fixed output voltage configuration
• Compact 3x4 mm UCSP package

Applications

• WCDMA cellular phone power amplifiers
• Portable wireless communication devices
• Battery-powered mobile systems

Procurement Notes

Verify the specific suffix (XEBC) against official Analog Devices documentation to confirm pinout and thermal characteristics. Confirm RoHS compliance status as distributor data may vary. Check for obsolescence or limited availability notices directly from the manufacturer before procurement planning.

Selection Notes

Select this component when a fixed output voltage is required for WCDMA PA biasing. Ensure the 600 mA current limit meets load requirements. Consider the UCSP package size constraints for dense PCB layouts. Verify compatibility with the system's input voltage range of 2.6 V to 5.5 V.

Part Context

Part of the MAX1820/MAX1821 family of synchronous step-down converters designed for mobile phones. The XEBC suffix denotes a specific fixed-output variant within the UCSP package line, distinct from the adjustable MAX1820 series.

Replacement Considerations

MAX1820ZEUB-T is a related adjustable buck regulator from the same family but requires external feedback components.