LM3279TLE/NOPB

Special Purpose Regulators Overview

The LM3279TLE/NOPB is a specialized buck-boost converter designed for RF power amplifier applications in 3G, 3.5G, and 4G systems. It features an integrated MIPI RFFE interface for digital control. The device operates with an input voltage range of 2.7V to 5.5V and provides a single adjustable output voltage from 0.4V to 4.2V. Key electrical specifications include a quiescent current of 1.4 mA and a switching frequency of 2.4 MHz. It supports operating temperatures between -30°C and +85°C.

Special Purpose Regulators Feature Summary

• Integrates MIPI RFFE interface for direct digital control of RF power amplifiers
• Utilizes buck-boost topology to maintain stable regulation across varying input conditions
• Optimized for low quiescent current to enhance system efficiency in mobile devices

Special Purpose Regulators Applications

• 3G RF Power Amplifier Voltage Regulation
• 3.5G RF Power Amplifier Voltage Regulation
• 4G RF Power Amplifier Voltage Regulation

Special Purpose Regulators Procurement Notes

Verify the specific ordering suffix matches the required package and temperature grade. Confirm that the MIPI RFFE interface compatibility aligns with the target baseband processor or RF transceiver. Ensure the supply voltage limits are respected within the defined operational envelope to prevent device damage.

Special Purpose Regulators Selection Notes

Select this component when a dedicated regulator with digital interface integration is required for cellular RF stages. The buck-boost architecture is suitable for battery-powered applications where input voltage may drop below the required output level. Consider the thermal performance of the 16-DSBGA package during high-current operation.

Special Purpose Regulators Part Context

This part belongs to Texas Instruments' portfolio of special purpose regulators tailored for wireless communication infrastructure. It addresses the need for precise voltage control in modern cellular handsets and modules, replacing discrete solutions with a compact, digitally controllable IC.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pin-to-pin compatibility and electrical parameter equivalence before considering alternative manufacturers.

Special Purpose Regulators FAQ

What is the primary interface used for controlling the LM3279?

The LM3279 utilizes the MIPI RFFE (Radio Frequency Front-End) interface for digital control.

Can the LM3279 operate as both a buck and boost converter?

Yes, it employs a buck-boost topology to regulate the output voltage regardless of whether the input is higher or lower than the output.