Analog Devices Inc. LT3507AEUHF#PBF

Overview

LT3507AEUHF#PBF from Analog Devices is a triple monolithic step-down regulator with an additional low dropout regulator function for compact multi-rail power supplies. The device integrates three current-mode buck converters with internal power switches, providing one 2.7A output and two 1.8A outputs from a wide 4V to 36V input range.

As part of the LT3507A family, LT3507AEUHF#PBF offers antiphase switching to reduce input ripple, independent run and tracking/soft-start controls, power-good indicators, programmable undervoltage and overvoltage lockouts, and adjustable 250kHz to 2.5MHz switching frequency. For engineers reviewing the LT3507AEUHF#PBF datasheet, LT3507AEUHF#PBF pinout, LT3507AEUHF#PBF application, or LT3507AEUHF#PBF equivalent, this device is widely used in automotive electronics, industrial supplies, distributed power regulation, DSP power, FPGA rails, and embedded multi-output power systems.

Technical Context

In automotive and industrial embedded systems, LT3507AEUHF#PBF operates as a synchronized three-channel buck regulator that converts a high-voltage input into several lower-voltage rails for processors, DSPs, memory, I/O, and auxiliary circuits. Its 4V to 36V input range supports 12V and 24V supply environments.

All three switching regulators are synchronized to a single oscillator, and the higher-current 2.7A channel switches out of phase with the other two channels to reduce input ripple current. Independent shutdown, tracking/soft-start, and power-good outputs make the device useful for systems where rail startup order and microcontroller supervision matter.

LT3507AEUHF#PBF is commonly used in automotive control modules, industrial controllers, distributed power boards, DSP and FPGA platforms, communication equipment, and embedded products that require three efficient buck rails in a thermally enhanced QFN package.

Key Specifications

Pinout & Package

The LT3507AEUHF#PBF pinout supports three buck channels, oscillator/synchronization control, tracking and soft-start networks, feedback pins, power-good outputs, LDO-related connections, and exposed-pad grounding.

For PCB layout, each buck channel should have compact input-capacitor, switch-node, diode or synchronous path, inductor, and output-capacitor routing. Feedback traces should return from clean output nodes, while the exposed pad should connect to thermal copper for heat spreading.

Key Features

• Three integrated buck regulators reduce external regulator count.
• One 2.7A and two 1.8A outputs support processor, memory, I/O, and auxiliary rails.
• Wide 4V to 36V input range suits automotive and industrial supply buses.
• Antiphase switching lowers input ripple in multi-output power systems.
• Tracking, soft-start, and power-good functions simplify sequencing.
• High programmable switching frequency enables small inductors and ceramic capacitors.

Applications

Equivalent & Alternatives

When evaluating a LT3507AEUHF#PBF equivalent, engineers should compare input range, output-current mix, switching frequency, sequencing features, power-good behavior, package, and thermal performance.

Compared with LT3507EUHF#PBF, LT3507AEUHF#PBF provides the higher-current LT3507A output mix. LT3507AEUHF#PBF vs LT3507AEFE#PBF selection mainly depends on QFN versus TSSOP package requirements and the board's thermal layout.

Quality

LT3507AEUHF#PBF should be sourced as original Analog Devices components through traceable supply channels. Quality checks may include QFN package inspection, top-mark validation, solderability testing, moisture handling review, and three-channel output electrical testing.

Production validation should include startup sequencing, soft-start and tracking behavior, power-good timing, load-transient response on all outputs, thermal performance, switching-node layout review, and input-ripple measurement under simultaneous channel loading.

Availability

LT3507AEUHF#PBF available at Aetrix Electronics and is suitable for automotive, industrial, distributed power, DSP, FPGA, and embedded multi-rail power designs.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM and industrial electronics 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 QFN footprint, output-current budget, input-voltage conditions, sequencing needs, 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 multi-output step-down regulator series integrating three monolithic buck converters with sequencing, synchronization, power-good reporting, and wide-input operation for automotive, industrial, DSP, and FPGA power systems.

FAQ

What is LT3507AEUHF#PBF used for?

LT3507AEUHF#PBF is used for automotive, industrial, DSP, FPGA, and distributed power systems requiring three synchronized step-down regulator outputs.

Where can I find the LT3507AEUHF#PBF datasheet download?

The LT3507AEUHF#PBF datasheet is available from Analog Devices and includes electrical specifications, output-current ratings, package data, pin functions, and application circuits.

What should be considered in LT3507AEUHF#PBF pinout design?

Designers should separate the three switching channels carefully, keep each high-current loop compact, route feedback traces away from switch nodes, and use the exposed pad for thermal grounding.

How does LT3507A reduce input ripple?

The LT3507A switches the 2.7A regulator channel out of phase with the other two channels, reducing input ripple current in multi-output designs.

What are common LT3507AEUHF#PBF equivalent solutions?

Common alternatives include LT3507 family variants and LT3507A package variants selected according to current rating, package footprint, and sequencing requirements.