LTM4651EY#PBF

Updated: 2026-07-24

Overview

The LTM4651EY#PBF is a high-performance μModule regulator manufactured by Analog Devices, a leader in power management solutions. This device integrates a step-down DC/DC converter with power MOSFETs, inductors, and support components in a compact BGA package. Designed for demanding applications, it offers high efficiency (up to 94%) and operates over a wide input voltage range of 4.5V to 16V, delivering up to 10A of output current. The module's compact form factor (15mm × 15mm × 5.01mm) makes it particularly suitable for space-constrained applications in industrial, telecom, and data center environments.

Structure and Working Principle

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The LTM4651EY#PBF utilizes a synchronous buck converter topology to efficiently step down higher input voltages to lower output voltages (adjustable from 0.6V to 5.5V). The module incorporates all necessary power components including the controller, power switches, inductor, and compensation circuitry. Operation is based on pulse-width modulation (PWM) with current mode control, providing excellent transient response and stability. The integrated design minimizes parasitic elements and simplifies board layout compared to discrete solutions. Thermal management is facilitated through the package's exposed metal pad, which should be properly connected to PCB copper for heat dissipation.

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Key Features

This μModule regulator stands out for its high power density and ease of use. The integrated design eliminates 20-30 discrete components that would otherwise be required, significantly reducing design time and board space. Notable features include programmable switching frequency (250kHz to 1MHz), output voltage tracking, and synchronization capability. The device also includes comprehensive protection features such as overcurrent protection, overvoltage protection, and overtemperature shutdown. The LTM4651EY#PBF operates across a -40°C to 125°C temperature range, making it suitable for harsh industrial environments.

Application Areas

The LTM4651EY#PBF finds extensive use in applications requiring compact, efficient power conversion. Primary markets include telecommunications infrastructure, networking equipment, and industrial automation systems. In computing applications, it's commonly used to power FPGAs, ASICs, and processors in servers and storage systems. The module's high efficiency makes it particularly valuable in power-conscious applications like 5G base stations and edge computing devices. Its robust design also suits medical equipment and test/measurement instruments where reliability is critical.

Maintenance and Precautions

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Proper handling and installation are crucial for optimal performance of the LTM4651EY#PBF. The BGA package requires careful soldering following the manufacturer's recommended reflow profile to prevent thermal damage. For reliable operation, ensure adequate PCB copper area for heat dissipation and maintain proper clearance from other heat-sensitive components. Input and output capacitors should be placed as close to the module as possible to minimize loop inductance. Regular inspection for solder joint integrity is recommended, especially in applications subject to thermal cycling or vibration.

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B2B Procurement Guide

When sourcing the LTM4651EY#PBF, verify the supplier's authorization status with Analog Devices to ensure genuine components. Lead times can vary, so plan procurement accordingly for production schedules. Consider purchasing evaluation boards (DC2225A) for design verification. For volume purchases, negotiate pricing based on quantity tiers - typical MOQ starts at 100 pieces. Compare distributor offerings from authorized channels like Arrow, Avnet, and Digi-Key. Ensure compliance with relevant industry standards (RoHS, REACH) for your target markets.