LT3514EUFD#PBF

Overview

The LT3514EUFD#PBF is a triple step-down switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 3.2 V to 36 V and provides three adjustable positive outputs, each capable of delivering up to 2 A. The device utilizes a buck topology without synchronous rectification and features a switchable frequency range from 350 kHz to 2.2 MHz. It is housed in a QFN-28 package with surface mount installation and supports operation temperatures between -40°C and +125°C.

Feature Summary

• Integrates three independent buck regulators for multi-rail power distribution
• Supports 100% duty cycle operation for low dropout performance
• Features adjustable switching frequency to optimize efficiency and component size

Applications

• Portable battery-powered equipment requiring multiple voltage rails
• Industrial control systems with distributed power architectures
• Automotive always-on systems needing wide input voltage tolerance

Procurement Notes

Verify the specific suffix EUFD against the official datasheet to confirm the QFN-28 package and temperature grade. Ensure compatibility with PCB footprint dimensions for the exposed pad thermal connection. Cross-reference the manufacturer part number directly with Analog Devices documentation to avoid counterfeit components or incorrect variant substitutions.

Selection Notes

Select this component when designing circuits that require three separate regulated outputs from a single high-voltage source. The non-synchronous design may be preferred for cost-sensitive applications where peak efficiency is secondary to simplicity. Evaluate the thermal requirements of the QFN-28 package under maximum load conditions to ensure adequate heat dissipation on the printed circuit board.

Part Context

This part belongs to the LT3514 family of triple output DC/DC converters. It shares functional similarities with other multi-channel regulators but is distinct in its specific current ratings and lack of synchronous rectifiers. The EUFD suffix denotes the specific package type and operating temperature range defined by the manufacturer.

Replacement Considerations

LT3514IFE#PBF offers identical electrical functionality but utilizes a 24-TSSOP package instead of QFN-28.