LT3514EUFD

Overview

The LT3514EUFD is a triple step-down switching regulator IC manufactured by Analog Devices Inc. It operates with an input voltage range of 3.2V to 36V and provides three adjustable positive outputs, each capable of delivering up to 2A. The device features a synchronous buck topology with a switch frequency ranging from 350kHz to 2.2MHz. It is housed in a 28-lead QFN package (4x4mm) with an exposed pad for thermal dissipation. The component supports operation across a temperature range of -40°C to +125°C TJ.

Feature Summary

• Integrates three independent synchronous buck converters within a single compact package
• Supports 100% duty cycle operation for low dropout performance
• Features programmable switching frequency to optimize external component size
• Includes internal soft-start and current limit protection mechanisms

Applications

• Multi-rail power distribution systems requiring isolated or coupled supplies
• Industrial control boards needing multiple voltage levels from a single source
• Automotive infotainment and instrumentation power architectures
• Telecommunications equipment requiring efficient high-current regulation

Procurement Notes

Verify the specific suffix EUFD corresponds to the 28-QFN package variant when sourcing. Confirm RoHS compliance status via the manufacturer's latest material declaration. Ensure thermal design accounts for the exposed pad connection on the QFN-28 footprint. Cross-reference the datasheet revision date to confirm pinout compatibility with existing board layouts.

Selection Notes

Select this component when designing systems requiring three separate regulated rails from a common input bus. The wide input voltage range accommodates various supply sources including automotive batteries. Consider the maximum output current capability per channel against total system load requirements. Evaluate the switching frequency setting to balance efficiency against passive component volume constraints.

Part Context

This part belongs to the LT3514 family of triple step-down regulators designed for high-efficiency power management. It complements other Analog Devices PMIC solutions by offering integrated synchronization capabilities. The device addresses space-constrained applications where multiple discrete regulators would otherwise increase board area and complexity.

Replacement Considerations

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