Analog Devices Inc. LT3507AIFE#PBF

Overview

LT3507AIFE#PBF from Analog Devices is a triple monolithic step-down regulator designed to generate three efficient buck rails from a wide input supply. The device integrates one 2.7A regulator and two 1.8A regulators, making it suitable for embedded systems that need core, I/O, memory, and auxiliary rails without three separate buck ICs.

As part of the LT3507A product family, LT3507AIFE#PBF supports 4V to 36V input operation, antiphase switching to reduce input ripple, adjustable and synchronizable switching frequency, individual run and tracking/soft-start functions, and power-good status outputs. For engineers reviewing the LT3507AIFE#PBF datasheet, LT3507AIFE#PBF pinout, LT3507AIFE#PBF application, or LT3507AIFE#PBF equivalent, this device is widely used in automotive electronics, industrial supplies, DSP power systems, FPGA rails, distributed power regulation, and communication equipment.

Technical Context

In automotive and industrial boards, LT3507AIFE#PBF operates as a synchronized three-channel buck regulator that converts a 12V, 24V, adapter, or distributed bus input into multiple lower-voltage rails.

The 2.7A channel can supply the highest-current rail, while the two 1.8A channels can power memory, I/O, analog, or auxiliary circuitry. Antiphase channel operation helps reduce input ripple current compared with unrelated single buck regulators switching independently.

LT3507AIFE#PBF is especially useful in DSP and FPGA systems because tracking/soft-start pins and power-good outputs help manage startup sequencing and rail supervision across several regulated outputs.

Key Specifications

Pinout & Package

The LT3507AIFE#PBF pinout includes three buck switch nodes, input supply pins, boost pins, feedback pins, run/soft-start/tracking controls, synchronization/frequency setting, power-good outputs, and thermal ground connections.

Each buck channel should have compact high-current routing. Feedback traces should return from quiet output points, and the exposed thermal path should connect to solid copper to manage heat across simultaneous channel loading.

Key Features

• Three integrated buck channels reduce regulator count.
• 2.7A plus dual 1.8A current ratings support processor-oriented rails.
• 4V to 36V input range fits automotive and industrial buses.
• Antiphase switching reduces input ripple.
• Tracking/soft-start and power-good outputs support sequencing.
• Synchronizable frequency supports EMI planning.

Applications

Equivalent & Alternatives

When evaluating a LT3507AIFE#PBF equivalent, engineers should compare three-output current ratings, input range, switching frequency, sequencing pins, power-good behavior, package, and thermal performance.

Compared with LT3507AEFE#PBF, LT3507AIFE#PBF is selected according to package, temperature, and sourcing requirements within the LT3507A family. LT3507AIFE#PBF vs TPS65263 selection depends on current budget, sequencing method, EMI plan, package footprint, and existing PCB compatibility.

Quality

LT3507AIFE#PBF should be sourced as original Analog Devices components through traceable and controlled channels. Quality checks may include package inspection, top-mark validation, solderability testing, and electrical verification of all three buck outputs.

Production validation should include startup tracking, power-good timing, output accuracy, thermal rise under multi-channel load, input ripple, and switching-node layout behavior.

Availability

LT3507AIFE#PBF available at Aetrix Electronics and is suitable for automotive, industrial, DSP, FPGA, and embedded multi-rail power systems.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package type, output-current budget, thermal design, lead time, lifecycle status, and sourcing continuity helps improve manufacturing stability.

Manufacturer

Analog Devices is a global semiconductor manufacturer specializing in analog ICs, power management, mixed-signal products, data converters, RF solutions, sensors, and embedded signal-chain technologies for industrial, communication, automotive, healthcare, and consumer applications.

The LT3507A product family is a triple step-down regulator series integrating three monolithic buck converters with synchronization, tracking, soft-start, and power-good functions for wide-input multi-rail systems.

FAQ

What is LT3507AIFE#PBF used for?

LT3507AIFE#PBF is used for automotive, industrial, DSP, FPGA, and distributed power systems needing three buck regulator outputs.

Where can I find the LT3507AIFE#PBF datasheet download?

The LT3507AIFE#PBF datasheet is available from Analog Devices and includes electrical ratings, package data, pin descriptions, and application guidance.

What should be considered in LT3507AIFE#PBF pinout design?

Designers should keep all three switching loops compact, route feedback away from switch nodes, and use thermal copper for simultaneous multi-channel load operation.

How does LT3507AIFE#PBF reduce input ripple?

It uses antiphase switching behavior to reduce combined input ripple current across the buck channels.

What are common LT3507AIFE#PBF equivalent solutions?

Common candidates include LT3507AEFE#PBF and TPS65263 depending on package, current, sequencing, and power-tree requirements.