MAX881REUB+

Overview

The MAX881REUB+ is a specialized power management IC designed as a low-noise bias supply for GaAsFET power amplifiers. It operates within an input voltage range of 2.5 V to 5.5 V and delivers a fixed negative output voltage between -2.1 V and -1.9 V. The device provides an output current of 4 mA while consuming only 500 µA of quiescent current. It features a Power OK status indicator and is housed in a compact UMAX-10 surface-mount package, suitable for operation from -40°C to +85°C.

Feature Summary

• Provides low-noise negative bias voltage specifically optimized for GaAsFET power amplifier applications
• Includes integrated Power OK signal to indicate valid output voltage status
• Operates with ultra-low quiescent current consumption to minimize system power drain

Applications

• Biasing GaAsFET power amplifiers in RF communication systems
• Portable wireless devices requiring efficient negative rail generation
• RF front-end modules in cellular infrastructure equipment

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to limited availability status. Confirm RoHS compliance documentation matches the specific batch. Ensure the UMAX-10 package variant aligns with PCB footprint requirements. Validate operating temperature range suitability for the intended environmental conditions before integration into final designs.

Selection Notes

Select this component when designing circuits requiring a stable, low-noise negative bias for GaAsFET PA stages. The fixed output voltage eliminates external resistor networks, simplifying layout. Consider the 4 mA output capability against load requirements. The low input current makes it suitable for battery-powered applications where standby power conservation is critical for extended operational life.

Part Context

This part belongs to the MAX881R series of specialized PMICs from Analog Devices/Maxim Integrated. It addresses the specific need for clean negative voltage rails in RF power amplifier designs. The UMAX-10 package offers a small form factor compared to larger linear regulators, aiding in space-constrained mobile and base station implementations.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.