MAX2601ESA

Overview

The MAX2601ESA is a silicon bipolar RF power transistor designed for portable cellular and wireless equipment. It delivers 1W of output power at 900MHz from a 3.6V supply with 58% efficiency in constant-envelope applications. The device operates within a DC-to-microwave frequency range and supports NADC (IS-54) operation at 29dBm with -28dBc ACPR from a 4.8V supply. Key electrical parameters include a collector-emitter voltage of 17V, maximum collector current of 1.2A, and power dissipation of 6.4W. It is housed in an 8-pin SOIC package with an extended temperature range of -40°C to +85°C.

Feature Summary

• Operates from low voltage sources including one Li-Ion or three NiCd/NiMH batteries
• Eliminates the need for negative bias voltages or supply switching circuitry
• Utilizes low-cost silicon bipolar technology to avoid complex voltage inverters
• Provides high efficiency of 58% for constant-envelope modulation schemes

Applications

• Narrow-Band PCS (NPCS)
• 915MHz ISM Transmitters
• Microcellular GSM (Power Class 5)
• AMPS Cellular Phones
• Digital Cellular Phones

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature rating. Ensure compatibility with the required thermal management solutions, as the backside slug must be properly soldered to a ground plane for optimal performance and reliability. Confirm that the application design accounts for the specific impedance requirements detailed in the datasheet.

Selection Notes

Select the MAX2601ESA when a standalone RF power transistor is required without integrated biasing components. This part is suitable for designs where external bias networks are preferred or already implemented. Consider the MAX2602 variant if on-chip thermal matching diodes are desired for simplified bias control across temperature variations. Evaluate the 8-pin SOIC package constraints regarding thermal dissipation and PCB layout space.

Part Context

The MAX2601ESA belongs to the MAX2601/MAX2602 series of RF power transistors optimized for 900MHz applications. These devices were developed to replace GaAsFET amplifiers in portable wireless systems by offering comparable performance with simpler drive requirements. The series represents a transition toward lower-voltage, higher-efficiency silicon-based RF solutions for mobile communication standards active during the late 1990s and early 2000s.

Replacement Considerations

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