LT3980IDE#PBF

Overview

The LT3980IDE#PBF is a synchronous step-down DC/DC converter from Analog Devices, designed for high-voltage input applications. It supports an input voltage range from 3.6V to 58V and delivers up to 2A of output current. The device features a wide switching frequency range from 225kHz to 2.25MHz, allowing for optimization between efficiency and external component size. It provides a single adjustable output starting at 0.79V. Packaged in a compact 14-lead DFN (4mm x 3mm) with an exposed pad, it operates reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Synchronous rectification architecture for improved efficiency
• Wide input voltage capability suitable for industrial systems
• Flexible switching frequency selection via external resistor
• Integrated current mode control for fast transient response

Applications

• Industrial automation power supplies
• Telecommunications infrastructure equipment
• Inverter and motor drive auxiliary power
• High-voltage battery-powered systems

Procurement Notes

Verify the specific suffix 'IDE' corresponds to the industrial temperature grade (-40°C to +125°C) and the 'PBF' indicates lead-free RoHS compliance. Confirm the package type matches the 14-DFN footprint requirements for your PCB layout. Ensure the ordering information aligns with the manufacturer's latest datasheet specifications before finalizing procurement.

Selection Notes

Select this component when a high-voltage input range up to 58V is required alongside moderate output current capabilities. The adjustable switching frequency allows designers to balance EMI performance against passive component size. Consider the thermal dissipation requirements of the exposed pad DFN package for high-load applications within the specified operating temperature range.

Part Context

This part belongs to the LT3980 family of high-voltage synchronous buck converters. It is engineered for robust performance in demanding environments where standard low-voltage regulators cannot operate. The device integrates the high-side and low-side switches, eliminating the need for external MOSFETs and simplifying the design process for compact power solutions.

Replacement Considerations

Consult official documentation for direct pin-to-pin compatible alternatives within the Analog Devices portfolio. Verify that any substitute maintains the same input voltage range, output current capacity, and package dimensions to ensure mechanical and electrical compatibility without redesigning the surrounding circuitry.