LT3958IUHE#PBF

Overview

The LT3958IUHE#PBF is a high input voltage DC/DC switching regulator manufactured by Analog Devices Inc. It supports multiple topologies including boost, flyback, inverting, and SEPIC configurations. The device operates with an input voltage range of 5V to 80V and delivers a maximum switch current of 3.3A. It features a programmable switching frequency from 100kHz to 1MHz and provides an adjustable output voltage up to 84V. The component is housed in a 36-WFQFN package with exposed pad and functions within a junction temperature range of -40°C to +125°C.

Feature Summary

• Supports versatile power conversion topologies including boost, flyback, inverting, and SEPIC for flexible system design.
• Capable of handling high input voltages up to 80V while delivering substantial switch current.
• Features adjustable switching frequency to optimize efficiency and external component size.
• Includes shutdown functionality to minimize quiescent current consumption during standby.

Applications

• Industrial control systems requiring isolated or non-isolated high-voltage power rails
• Automotive electronics operating under wide input voltage variations
• Telecommunications infrastructure equipment needing reliable DC-DC conversion
• Battery-powered devices utilizing SEPIC or inverting topologies

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm that the IUHE variant meets the required industrial temperature specifications for your application environment. Ensure compatibility with the 36-QFN footprint during PCB layout. Cross-reference the datasheet for thermal dissipation requirements given the exposed pad design.

Selection Notes

Select this component when designing circuits requiring high input voltage tolerance and multiple topology options. Consider the 3.3A switch current limit for load requirements. Evaluate the need for synchronous rectification versus the internal switch configuration. Verify that the 36-pin QFN package fits within the mechanical constraints of the target enclosure.

Part Context

This part belongs to the LT3958 family of high-performance DC/DC converters designed for demanding applications. It shares functional similarities with other high-voltage regulators but offers unique multi-topology support. The device is distinct from standard buck converters due to its ability to step up, step down, invert, or isolate voltages using a single IC architecture.

Replacement Considerations

LT3958EUHE#TRPBF is a compatible alternative offering identical electrical performance but supplied in tape and reel packaging instead of tubes.