LT3514IUFD#PBF

Overview

The LT3514IUFD#PBF is a triple step-down switching regulator IC manufactured by Analog Devices Inc. It features three independent buck converters housed in a 28-lead QFN package with an exposed pad. The device supports an input voltage range from 3.2V to 36V and provides adjustable output voltages starting from a minimum of 0.8V. Each channel delivers up to 2A of output current, with one channel capable of 1A operation depending on configuration. The switching frequency is programmable between 350kHz and 2.2MHz. It operates within a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrates three independent synchronous buck regulators for multi-rail power distribution
• Supports 100% duty cycle operation for low dropout performance
• Features programmable switching frequency to optimize efficiency and component size
• Includes individual enable pins for independent channel control

Applications

• Portable equipment requiring multiple voltage rails
• Industrial control systems with distributed power architectures
• Communication infrastructure power supplies
• Battery-powered devices needing efficient step-down conversion

Procurement Notes

Verify the specific suffix and tape/reel or tube packaging requirements against your assembly line specifications. Confirm that the thermal pad connection matches your PCB footprint design guidelines. Ensure the operating temperature grade aligns with your environmental constraints. Cross-reference the datasheet revision to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when a compact solution for three isolated or common ground outputs is required. The wide input voltage range accommodates various battery and bus sources. Consider the thermal dissipation capabilities of the QFN package relative to your ambient conditions. Evaluate the need for external synchronization if noise immunity is critical in your system.

Part Context

This part belongs to the LT3514 family of triple buck regulators designed for high-density power applications. It complements other single and dual converter offerings by providing integrated multi-output capability in a small form factor. The series emphasizes efficiency and flexibility through adjustable frequency and independent control mechanisms.

Replacement Considerations

LT3514EUFD#PBF is a verified alternative within the same family offering identical electrical characteristics but potentially different temperature grades or packaging variants. Verify pin-to-pin compatibility and thermal performance before substitution.