MAX8508ETE

Overview

The MAX8508ETE is a PWM step-down DC-DC converter designed for WCDMA and cdmaOne handsets. It features a 75mΩ bypass FET and operates with an input voltage range of 2.6V to 5.5V. The device provides a single output adjustable from 0.75V to 3.4V. It supports a switching frequency of 1 MHz and functions within an operating temperature range of -40°C to +85°C. The component is housed in a 16-TQFN (4x4) surface-mount package.

Feature Summary

• Integrated 75mΩ bypass FET for efficient power management
• Optimized for WCDMA and cdmaOne handset applications
• Single-output PWM step-down conversion topology

Applications

• WCDMA mobile phone power supplies
• cdmaOne handset battery management systems
• Low-voltage digital circuit regulation

Procurement Notes

Verify the specific suffix (e.g., T for tape-and-reel or blank for tube) against your bill of materials, as packaging varies. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as regulatory details may differ by production batch. Ensure the 16-TQFN footprint matches your PCB design constraints before finalizing procurement.

Selection Notes

Select this component when designing power stages for dual-mode cellular handsets requiring low-profile solutions. The integrated bypass FET simplifies schematic design compared to discrete alternatives. Verify that the required output voltage falls within the 0.75V to 3.4V range and that the 1 MHz switching frequency aligns with your EMI and inductor size requirements.

Part Context

This part belongs to the Maxim Integrated line of power management ICs, specifically targeting portable communication devices. It serves as a dedicated voltage regulator for baseband processors and RF sections in legacy cellular standards. The TQFN package allows for compact board layouts typical in mobile handset architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices official cross-reference tools for verified equivalents.