LT3580IDD#PBF

Overview

The LT3580IDD#PBF is a monolithic DC-DC switching regulator manufactured by Analog Devices Inc. It integrates a high-voltage power switch and control circuitry to support multiple topologies including boost, SEPIC, and inverting configurations. The device operates with an input voltage range of 2.5V to 32V and provides a maximum switch current of 2A. It features a programmable switching frequency ranging from 200kHz to 2MHz. The component is housed in an 8-lead DFN package measuring 3mm x 3mm with an exposed thermal pad, designed for surface-mount applications.

Feature Summary

• Supports versatile converter topologies including boost, SEPIC, and inverting architectures within a single integrated circuit
• Integrates a high-current 2A power switch capable of handling wide input voltage ranges up to 32V
• Features adjustable switching frequency allowing optimization between efficiency and external component size
• Includes built-in soft-start functionality to limit inrush current during startup sequences

Applications

• Battery-powered portable equipment requiring flexible voltage conversion options
• Industrial systems needing isolated or non-isolated power supplies from varying input rails
• Automotive electronics utilizing SEPIC or inverting topologies for sensor interface circuits
• Telecommunications infrastructure providing stable bias voltages from fluctuating bus lines

Procurement Notes

Verify the specific suffix designation when ordering, as the IDD variant denotes a tube package configuration distinct from tape-and-reel alternatives like the IDDTRPBF. Confirm that the 3mm x 3mm DFN footprint matches the target PCB layout constraints. Ensure compatibility with the required thermal dissipation requirements due to the exposed pad design. Cross-reference the exact part number against manufacturer datasheets to guarantee correct pinout and electrical specifications for the intended application environment.

Selection Notes

Choose this component when design flexibility across boost, SEPIC, and inverting modes is required without increasing bill of materials complexity. The integrated 2A switch eliminates the need for external pass transistors in moderate power applications. Consider the thermal performance of the DFN package relative to the expected load current and ambient temperature conditions. Evaluate the benefits of the adjustable frequency range against electromagnetic interference constraints and passive component selection criteria for the specific power stage design.

Part Context

This device belongs to the LT3580 family of multi-topology DC-DC converters. It shares core architectural similarities with other variants such as the LT3580EDD and LT3580HMS8E, differing primarily in packaging type and temperature rating specifications. The family is designed to simplify power supply design by consolidating multiple converter functions into a single small-footprint IC, reducing board space and assembly costs compared to discrete solutions.

Replacement Considerations

LT3580EDD#PBF offers equivalent electrical performance in a different package format. LT3580HMS8E#TRPBF provides similar functionality with a MSOP package and tape-and-reel shipping option. Verify pin-to-pin compatibility and thermal characteristics before substituting these alternative part numbers in existing designs.