MAX1385BETM+

Overview

The MAX1385BETM+ is a dual RF LDMOS bias controller manufactured by Analog Devices Inc./Maxim Integrated. It is housed in a 48-TQFN (7x7) package and operates within a temperature range of -40°C to +85°C. The device functions as a PMIC for controlling LDMOS transistor bias voltages, utilizing a 5V supply. Key specifications include integrated current sensing and protection features designed for high-reliability RF applications.

Feature Summary

• Dual independent bias channels for precise control of RF LDMOS transistors
• Integrated current sensing and over-current protection mechanisms
• Designed for stable operation in demanding RF power amplifier environments

Applications

• RF power amplifier biasing systems
• Wireless communication infrastructure equipment
• Test and measurement instrumentation requiring stable DC bias

Procurement Notes

Verify the specific suffix and tape-and-reel quantity against the manufacturer's official datasheet before ordering. Confirm that the 48-TQFN footprint matches your PCB layout requirements. Ensure compatibility with the required 5V supply rail and check for any regional distribution restrictions or obsolescence notices directly from Analog Devices.

Selection Notes

Select this component when dual-channel precision biasing for LDMOS devices is required. It is suitable for designs needing integrated protection and current monitoring. Consider thermal performance within the TQFN package and ensure the control interface aligns with your system's microcontroller or FPGA capabilities.

Part Context

This part belongs to the MAX138 series of dual RF LDMOS bias controllers. It is designed to replace discrete bias solutions, offering higher integration and reliability. The MAX1385 variant specifically targets applications requiring robust protection and accurate voltage regulation for high-power RF stages.

Replacement Considerations

Publicly 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 component is unavailable.