LT8611IUDD#TRPBF

Overview

The LT8611IUDD#TRPBF 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 output current. The device supports adjustable switching frequencies from 200 kHz to 2.2 MHz, enabling high efficiency and compact solution sizes. It features a low quiescent current of 2.5 µA and includes integrated N-channel power switches with on-resistances of 110 mΩ (high-side) and 80 mΩ (low-side). The component is housed in a 24-lead QFN package and is rated for operation between -40°C and +125°C.

Feature Summary

• Integrates TrueSync™ synchronous rectification architecture using internal MOSFETs to replace external diodes, reducing conduction losses and improving efficiency at low output voltages.
• Employs peak current mode control with slope compensation to ensure stable operation during transient loads and allow inductor saturation without latch-up.
• Supports wide input voltage ranges with short minimum on-time, facilitating high step-down ratios even at elevated switching frequencies.

Applications

• Industrial automation systems requiring robust power regulation
• Automotive electronics operating within harsh thermal environments
• Point-of-load conversion for distributed power architectures

Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature grade (-40°C to +125°C) compared to commercial variants. Confirm the '#TRPBF' designation corresponds to tape-and-reel packaging containing lead-free components compliant with RoHS standards. Cross-reference the manufacturer part number with official datasheets to ensure compatibility with required thermal and electrical specifications.

Selection Notes

Select this component when designing circuits that demand high efficiency under heavy loads while maintaining small physical footprint through high-frequency operation. Consider the 2.5 A current limit and 42 V maximum input rating against system requirements. Evaluate thermal management needs based on the QFN-24 package characteristics and expected ambient temperatures.

Part Context

This part belongs to the LT8610/LT8611 family of high-performance synchronous buck regulators designed for demanding applications. The series is characterized by its ability to operate efficiently across wide input voltage ranges while minimizing external component count. These devices are engineered to provide reliable performance in industrial and automotive sectors where space constraints and thermal resilience are critical design factors.

Replacement Considerations

LT8610EUDD#TRPBF: Commercial grade variant with identical electrical specifications but limited to 0°C to 70°C operating temperature range.