MAX8667ETEAA+T

Overview

The MAX8667ETEAA+T is a quad-output power management IC featuring two synchronous buck converters and two low-dropout regulators. It operates within an input voltage range of 2.8V to 5.5V. The device provides specific output configurations: Output 1 delivers 1.2V at 600mA, Output 2 supplies 1.8V at 1.2A, and Output 3 provides 2.8V at 300mA. Switching occurs at a fixed frequency of 1.5MHz. It functions reliably between -40°C and +85°C in a 16-TQFN package.

Feature Summary

• Integrates dual synchronous step-down converters with dual linear regulators for compact multi-rail power solutions
• Supports flexible output configuration through integrated switching and LDO topologies
• Operates from standard single-cell lithium battery or USB input voltages

Applications

• Pulse oximeter designs requiring optimized sensor performance and signal-to-noise ratio
• Portable medical diagnostic devices needing multiple regulated voltage rails
• Battery-operated handheld instrumentation systems

Procurement Notes

Verify component authenticity through authorized distribution channels due to obsolete status. Confirm RoHS compliance and REACH registration details prior to integration. Check for potential supply chain disruptions as the manufacturer has discontinued this specific part number. Ensure storage conditions meet moisture sensitivity level requirements before reflow soldering.

Selection Notes

Select this component when designing portable medical equipment requiring four distinct voltage rails from a single input source. The combination of synchronous buck and LDO outputs balances efficiency and noise performance. Verify that the required output currents align with the specified 600mA, 1.2A, and 300mA limits. Consider thermal dissipation capabilities within the 16-TQFN package for the intended enclosure design.

Part Context

This part belongs to the MAX8667 series, designed primarily for biomedical applications. It replaces older discrete power solutions by integrating multiple regulation stages into a single small-footprint package. The series supports various output combinations to accommodate different sensor and logic voltage requirements in compact medical devices.

Replacement Considerations

No public confirmed substitute part numbers are available. The product status is listed as obsolete. Designers should evaluate newer PMIC families from Analog Devices for pin-compatible or functionally equivalent alternatives.