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, featuring a collector-emitter voltage of 17V and a maximum continuous collector current of 1.2A. Packaged in an 8-pin SOIC with a thermal slug, it supports an extended operating temperature range from -40°C to +85°C.

Feature Summary

• Operates directly from single Li-Ion or three NiCd/NiMH battery cells without requiring negative bias voltages or drain switches.
• Utilizes low-cost silicon bipolar technology that eliminates the need for complex voltage inverters and sequencing circuitry found in GaAsFET amplifiers.
• Provides high collector efficiency of 58% when biased for constant-envelope modulation schemes such as FM or FSK.

Applications

• Narrow-Band PCS (NPCS) transmitters
• Microcellular GSM Power Class 5 modules
• 915MHz ISM band transmitters
• Digital cellular phones and AMPS cellular handsets

Procurement Notes

Verify the component designation matches the specific datasheet revision and package code S8E-12. Confirm the manufacturer origin is Analog Devices/Maxim Integrated. Ensure the part number suffix corresponds to the standard SOIC-8 configuration without additional functional modifications unless explicitly documented by the supplier.

Selection Notes

Select this component for discrete or module power amplifier final stages where low-voltage operation is critical. It is suitable for designs requiring high efficiency and linearity without the complexity of GaAs-based solutions. Consider the thermal management requirements associated with the backside slug connection for optimal performance.

Part Context

This component belongs to the MAX2601/MAX2602 series of RF power transistors. While the MAX2602 integrates a matched biasing diode for thermal compensation, the MAX2601 is the standalone transistor variant. Both share identical electrical characteristics and packaging but differ in internal integration for bias control.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official distributor databases for cross-reference data or contact the manufacturer for approved alternative components.