Analog Devices Inc. LT3383IUJM#PBF

Overview

LT3383IUJM#PBF from Analog Devices is a multi-output power-management IC integrating four synchronous step-down converters and three 300mA LDO regulators. The device is designed for application processor and embedded computing systems that require several high-current and low-noise rails from one compact PMIC.

As part of the LT3383 product family, LT3383IUJM#PBF combines two 2.5A buck regulators, two 1.5A buck regulators, three LDO outputs, 2.25MHz switching, independent enable pin-strap sequencing, and a 40-lead 6mm x 6mm QFN package. For engineers reviewing the LT3383IUJM#PBF datasheet, LT3383IUJM#PBF pinout, LT3383IUJM#PBF application, or LT3383IUJM#PBF equivalent, this device is widely used in application processor platforms, SoC core rails, memory rails, I/O rails, low-noise analog supplies, and automotive embedded systems.

Technical Context

In processor-based embedded systems, LT3383IUJM#PBF operates as a seven-rail PMIC where four switching buck converters supply high-efficiency core, memory, I/O, and peripheral rails while three LDO regulators provide low-noise auxiliary supplies.

The 2.25MHz switching frequency supports small external inductors and capacitors, which is important around dense processors and SoCs. Independent enable pin-strap sequencing helps designers control startup order without needing a fully programmable digital PMIC interface.

LT3383IUJM#PBF is commonly used when a board needs several coordinated rails in a compact footprint, such as automotive processors, industrial compute modules, infotainment electronics, camera systems, and embedded application-processor designs.

Key Specifications

Pinout & Package

The LT3383IUJM#PBF pinout includes four buck power stages, three LDO outputs, enable and sequencing pins, feedback nodes, input supply pins, and thermal ground connections in a 40-lead QFN package.

PCB design should separate the four switching loops, place inductors and capacitors close to each buck channel, route feedback away from switch nodes, and connect the QFN thermal pad to a solid ground plane.

Key Features

• Four synchronous buck regulators support high-current processor rails.
• Three 300mA LDOs provide low-noise auxiliary outputs.
• 2.25MHz operation reduces passive component size.
• Pin-strap sequencing supports controlled rail startup.
• Compact 40-lead QFN package supports dense SoC layouts.
• Multi-output integration reduces regulator count and layout complexity.

Applications

Equivalent & Alternatives

When evaluating a LT3383IUJM#PBF equivalent, engineers should compare number of rails, buck-current ratings, LDO-current ratings, sequencing method, package footprint, switching frequency, and automotive qualification needs.

Compared with LT3383HUJM#PBF, LT3383IUJM#PBF selection depends on the required grade and sourcing condition. LT3383IUJM#PBF vs LT3380HUJM#PBF selection depends on whether the design needs pin-strap sequencing or I2C-configurable power management.

Quality

LT3383IUJM#PBF should be sourced as original Analog Devices components through traceable supply channels. Quality checks may include QFN inspection, top-mark validation, solderability testing, and electrical testing of all buck and LDO outputs.

Production validation should include rail sequencing, buck load transients, LDO noise, thermal behavior under multiple active rails, output accuracy, and switching-layout review.

Availability

LT3383IUJM#PBF available at Aetrix Electronics and is suitable for processor, automotive, industrial compute, camera, and multi-rail embedded 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 rail-current budget, package footprint, sequencing needs, lead time, lifecycle status, and sourcing continuity helps improve procurement 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 LT3383 product family is a multi-output PMIC series integrating four synchronous buck regulators and three LDO outputs for processor-centric embedded systems requiring compact sequenced power rails.

FAQ

What is LT3383IUJM#PBF used for?

LT3383IUJM#PBF is used for application processor, SoC, automotive, industrial compute, and vision systems requiring four buck rails and three LDO rails.

Where can I find the LT3383IUJM#PBF datasheet download?

The LT3383IUJM#PBF datasheet is available from Analog Devices and includes rail ratings, sequencing information, package data, pin functions, and application guidance.

What should be considered in LT3383IUJM#PBF pinout design?

Designers should separate switching loops, place passives near each buck channel, route feedback cleanly, and use a solid thermal pad connection for the 40-lead QFN package.

Does LT3383IUJM#PBF support rail sequencing?

Yes. It supports independent enable pin-strap sequencing for controlled startup.

What are common LT3383IUJM#PBF equivalent solutions?

Common candidates include LT3383HUJM#PBF and LT3380HUJM#PBF depending on grade, sequencing method, and I2C control requirements.