LT3479EFE#TRPBF

Overview

The LT3479EFE#TRPBF is a boost DC/DC converter manufactured by Analog Devices Inc. It features an integrated power switch capable of delivering up to 3A output current with a maximum output voltage of 42V. The device operates within an input voltage range of 2.5V to 24V and supports switching frequencies from 200kHz to 3.5MHz. It includes soft-start functionality, inrush current protection, and a shutdown pin for low quiescent current operation of 5mA. The component is housed in a DFN-14 surface-mount package and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates a 3A power switch with boost topology for high-current applications
• Includes programmable soft-start and inrush current limiting to manage startup stress
• Offers wide adjustable switching frequency range from 200kHz to 3.5MHz
• Features a shutdown control pin to minimize standby power consumption

Applications

• Battery-powered portable equipment requiring efficient step-up conversion
• Industrial systems needing isolated or non-isolated power rails
• Automotive electronics operating on varying battery voltages
• General-purpose DC/DC conversion in space-constrained designs

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the DFN-14 package variant matches the footprint requirements of the target PCB design. Ensure compatibility with the required thermal dissipation characteristics for the intended operating environment. Cross-reference the manufacturer's latest datasheet for any updates regarding lead-free compliance and material declarations prior to final procurement approval.

Selection Notes

Select this component when a single-output boost converter with high current capability and integrated protection features is required. Consider the wide input voltage range suitable for lithium-ion or multi-cell battery sources. Evaluate the need for external compensation components based on the chosen switching frequency. Compare against other family members if different package sizes or additional outputs are necessary for the system architecture.

Part Context

This part belongs to the LT3479 series of full-featured DC/DC converters from Analog Devices. It is designed as a complete solution for boost applications, combining the controller, power switch, and protection circuits into a single compact package. The series emphasizes ease of use through integrated soft-start and inrush current limiting, reducing the complexity of external circuit design compared to discrete solutions.

Replacement Considerations

Direct substitutes may include other Analog Devices boost converters with similar 3A current ratings and 42V output limits. Verify pinout compatibility and electrical specifications before swapping. Check for equivalent thermal performance and package dimensions to ensure mechanical fit without redesigning the PCB layout.