MAX8805YEWECE+T

Overview

The MAX8805YEWECE+T is a high-efficiency, low-noise step-down DC-DC converter designed for powering RF power amplifiers in WCDMA and other cellular communication systems. It integrates a 600mA switch and operates from an input voltage range of 2.7V to 5.5V. The device provides a fixed output voltage of 3V with a maximum output current of 600mA. It utilizes a 2MHz switching frequency to allow for the use of small external components. The component is housed in a compact 16-WLP package and supports operation over an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrated 600mA power switch for efficient step-down conversion
• Optimized for low noise and ripple critical to RF PA performance
• Fixed 3V output configuration simplifies circuit design
• Compact 16-WLP package minimizes PCB footprint

Applications

• WCDMA Power Amplifier (PA) supply
• Cellular phone main logic or peripheral power rails
• Portable electronic devices requiring low-noise regulation

Procurement Notes

Verify the exact suffix against official Analog Devices documentation, as variations exist within the MAX8805 family. Confirm that the specific part number corresponds to the fixed 3V output version. Check for end-of-life status or obsolescence notices prior to procurement, as availability may be limited. Ensure the package type matches the required PCB layout constraints.

Selection Notes

Select this component when a low-noise, fixed 3V rail is required for sensitive RF circuits such as WCDMA power amplifiers. The integrated switch eliminates the need for external Schottky diodes, improving efficiency compared to linear regulators. Consider the 2MHz switching frequency for applications where small inductor size is prioritized over absolute peak efficiency at light loads.

Part Context

This part belongs to the MAX8805 series of hysteretic step-down converters specifically engineered for RF applications. Unlike general-purpose buck converters, this series emphasizes low output voltage ripple and fast transient response to support the dynamic power demands of modern wireless communication standards.

Replacement Considerations

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