Analog Devices Inc. LT3507IUHF#PBF

Overview

LT3507IUHF#PBF from Analog Devices is a triple monolithic step-down regulator for compact multi-rail power systems. The device integrates three current-mode buck regulators so a single wide-input IC can generate processor, memory, I/O, and auxiliary rails without three separate switching regulators.

As part of the LT3507 product family, LT3507IUHF#PBF supports wide 4V to 36V input operation, synchronized switching, antiphase ripple reduction, tracking/soft-start, and power-good status outputs for controlled multi-rail startup. For engineers reviewing the LT3507IUHF#PBF datasheet, LT3507IUHF#PBF pinout, LT3507IUHF#PBF application, or LT3507IUHF#PBF equivalent, this device is widely used in automotive electronics, industrial supplies, distributed power systems, DSP platforms, FPGA rails, and communication equipment.

Technical Context

In wide-input embedded boards, LT3507IUHF#PBF operates as a three-channel buck regulator that converts an automotive, industrial, adapter, or distributed bus into several lower-voltage rails used by digital and mixed-signal subsystems.

The LT3507 architecture synchronizes the three switching regulators and uses antiphase operation to reduce input ripple current. Tracking and soft-start pins allow rail startup order to be managed around processors, DSPs, FPGAs, memory, and analog circuitry.

LT3507IUHF#PBF is commonly used when a design needs multiple buck outputs with a shared oscillator, predictable sequencing, power-good monitoring, and a compact thermally enhanced package rather than several independent regulator ICs.

Key Specifications

Pinout & Package

The LT3507IUHF#PBF pinout includes input supply pins, three switch nodes, bootstrap pins, feedback inputs, run controls, tracking/soft-start pins, power-good outputs, frequency/synchronization control, and thermal ground.

For PCB design, each buck channel should have compact high-current loops, feedback should be routed away from switch nodes, and thermal copper should be used to manage heat across simultaneous outputs.

Key Features

• Three buck regulators reduce multi-rail component count.
• Wide 4V to 36V input range supports harsh supply buses.
• Antiphase switching reduces input ripple.
• Tracking and soft-start support processor rail sequencing.
• Power-good outputs simplify supervision.
• Synchronizable frequency supports EMI planning.

Applications

Equivalent & Alternatives

When evaluating a LT3507IUHF#PBF equivalent, engineers should compare input-voltage range, output-current mix, switching frequency, sequencing pins, power-good behavior, package, and thermal performance.

Compared with TPS65263, LT3507IUHF#PBF is selected when the Analog Devices LT3507 pinout, sequencing behavior, and package are already designed in. LT3507IUHF#PBF vs MPQ7920 selection depends on whether the design needs a triple-buck regulator or a more configurable PMIC with LDO rails.

Quality

LT3507IUHF#PBF should be sourced as original Analog Devices components through traceable supply 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, output accuracy, input ripple, load-transient response, thermal rise, synchronization behavior, and layout-sensitive switching noise.

Availability

LT3507IUHF#PBF available at Aetrix Electronics and is suitable for automotive, industrial, communication, DSP, FPGA, and distributed power platforms.

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, temperature grade, current budget, rail sequencing, lifecycle status, and sourcing continuity helps reduce procurement risk.

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 LT3507 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 LT3507IUHF#PBF used for?

LT3507IUHF#PBF is used for automotive, industrial, DSP, FPGA, and communication systems requiring three buck regulator outputs.

Where can I find the LT3507IUHF#PBF datasheet download?

The LT3507IUHF#PBF datasheet is available from Analog Devices and includes electrical ratings, pin functions, package data, and layout guidance.

What should be considered in LT3507IUHF#PBF pinout design?

Designers should keep each switch loop compact, route feedback away from switch nodes, and use proper thermal grounding for simultaneous channel operation.

Does LT3507IUHF#PBF support rail sequencing?

Yes. Tracking/soft-start and run controls support controlled rail startup.

What are common LT3507IUHF#PBF equivalent solutions?

Common candidates include TPS65263 and MPQ7920 depending on rail count, current rating, package, and control requirements.