LT8611EUDD

Overview

The LT8611EUDD is a synchronous step-down DC-DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 3.4 V to 42 V and delivers up to 2.5 A of output current. The device supports adjustable switching frequencies from 200 kHz to 2.2 MHz, enabling optimized efficiency and reduced external component size. It features a low quiescent current of 2.5 uA in shutdown mode and includes current sense amplifier integration for precise load regulation. The regulator offers flexible output voltage adjustment from 970 mV to 40 V and functions reliably across an extended temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency synchronous buck topology with internal power switches
• Includes a dedicated current sense amplifier for accurate load monitoring and protection
• Supports wide input voltage ranges suitable for industrial and automotive bus systems
• Features programmable switching frequency to optimize trade-offs between size and performance

Applications

• Industrial control systems requiring isolated or non-isolated power rails
• Automotive electronics operating on 12V or 24V nominal bus architectures
• Point-of-load regulation for embedded processors and memory modules
• Telecommunications infrastructure equipment power distribution

Procurement Notes

Verify the complete part number including suffixes such as #TRPBF to ensure correct packaging and lead-free compliance. Confirm that the specific revision matches your design requirements regarding thermal performance and pinout compatibility. Cross-reference official datasheets for absolute maximum ratings to prevent operational damage during procurement validation.

Selection Notes

Select this component when designing systems requiring high input voltages up to 42 V with moderate output currents around 2.5 A. Consider the integrated current sense feature if external shunt resistors are undesirable. Evaluate the thermal characteristics of the QFN-24 package against your PCB layout constraints to ensure adequate heat dissipation under full load conditions.

Part Context

This device belongs to the LT8611 family of synchronous buck regulators designed for high-voltage applications. It is part of Analog Devices' portfolio of power management integrated circuits aimed at simplifying power supply designs in demanding environments. The EUDD package variant provides a compact footprint suitable for space-constrained printed circuit board layouts.

Replacement Considerations

Consult official manufacturer documentation for verified cross-reference part numbers. Ensure any substitute component matches the input voltage range, output current capability, and package dimensions. Verify functional compatibility of control interfaces and thermal performance specifications before implementation.