MAX8805WEWEAA+

Overview

The MAX8805WEWEAA+T is a high-efficiency, hysteretic step-down DC-DC converter designed for WCDMA power amplifier applications. It integrates a 650mA switch and operates from an input voltage range of 2.7V to 5.5V. The device provides an adjustable output voltage from 0.4V to 5.5V with a fixed switching frequency of 2MHz. It features a compact 16-WLP package and supports operation temperatures from -40°C to +85°C.

Feature Summary

• Hysteretic control architecture for rapid transient response
• Integrated low-resistance power switch
• Bypass mode for enhanced efficiency at light loads

Applications

• WCDMA Power Amplifier (PA) supply
• RF transceiver biasing
• Portable communication devices

Procurement Notes

Verify the specific suffix 'AA' against official Analog Devices documentation to confirm pinout and electrical specifications. Note that this component may be listed as obsolete or discontinued in current distributor catalogs; check for valid replacement part numbers if availability is required.

Selection Notes

Select this regulator when designing for WCDMA PA power rails requiring fast dynamic response. Ensure the input voltage stays within the 2.7V to 5.5V limit. Consider thermal performance in the small WLP package under maximum load conditions.

Part Context

This part belongs to the MAX8805 family of hysteretic step-down converters. It is specifically optimized for powering RF components where quick load changes are common. The manufacturer is Analog Devices Inc., formerly Maxim Integrated.

Replacement Considerations

MAX8805WEWEEE+T

FAQ

What is the switching topology?

It uses a hysteretic buck topology.

Is the output voltage adjustable?

Yes, the output can be set between 0.4V and 5.5V.