MAX881REUB-TG074

Overview

The MAX881REUB-TG074 is a specialized low-noise bias supply integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. Designed for GaAsFET power amplifier applications, it operates within an input voltage range of 2.5 V to 5.5 V and delivers a regulated negative output voltage between -2.1 V and -1.9 V. The device draws a maximum input current of 500 uA and provides an output current capability of 4 mA. It functions as a charge pump inverter, converting positive inputs to negative outputs starting from -0.5 V. The component is housed in a 10-pin µMAX package and supports surface mount installation.

Feature Summary

• Provides low-noise negative bias generation specifically optimized for GaAsFET power amplifiers
• Integrates a charge pump circuit to invert input voltages into regulated negative outputs
• Features a Power OK indicator to signal valid bias supply status

Applications

• Biasing GaAsFET power amplifiers in RF communication systems
• Wireless device power management circuits
• Low-noise analog circuit supply requirements

Procurement Notes

Verify the exact suffix designation when ordering, as variations such as REUB+ and REUB-TG074 may exist within the same family. Confirm RoHS compliance status and lead-free specifications with the manufacturer or authorized distributor prior to procurement. Ensure the specific package type matches the design requirements.

Selection Notes

Select this component when a dedicated low-noise negative bias supply is required for GaAsFET PA applications. Consider the 2.5 V to 5.5 V input range and the specific -1.9 V to -2.1 V output characteristics. Evaluate the 500 uA quiescent current against system power constraints. Verify that the 10-pin µMAX package fits the PCB layout constraints.

Part Context

This part belongs to the MAX881R series of specialized PMICs designed for RF front-end modules. It addresses the need for clean, stable negative voltage rails in high-frequency analog circuits where noise sensitivity is critical. The integration of the charge pump and bias regulation simplifies the design compared to discrete solutions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices technical support for direct replacements or pin-compatible alternatives if this specific variant is unavailable.