LT8611EUDD#PBF

Overview

The LT8611EUDD#PBF is a synchronous step-down DC/DC converter featuring an integrated 42V, 2.5A power switch. It operates with an input voltage range of 3.4V to 42V and provides an adjustable output from 970mV to 40V at up to 2.5A. The device supports switching frequencies between 200kHz and 2.2MHz and includes capacitor sense (C-Sense) technology for precise load regulation. It offers a quiescent current of 1µA in shutdown mode and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a 42V, 2.5A synchronous buck power switch for compact solution design.
• Utilizes C-Sense technology to eliminate output voltage drop across PCB traces.
• Supports wide switching frequency adjustment from 200kHz to 2.2MHz.
• Features ultra-low shutdown quiescent current of 1µA.

Applications

• Industrial point-of-load regulation
• Distributed power systems
• Battery-powered equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the QFN-24 package type matches your board layout requirements. Ensure the operating temperature grade covers your environmental conditions. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm availability status and datasheet revisions before finalizing procurement.

Selection Notes

Select this component when a high-voltage input up to 42V is required alongside moderate output current capabilities. The C-Sense feature is critical for applications where trace resistance causes significant voltage drops. Consider the 2.2MHz maximum frequency option if minimizing passive component size is a priority, while noting potential efficiency trade-offs compared to lower frequencies.

Part Context

This part belongs to the LT8611 family of synchronous buck converters designed by Analog Devices. It is distinct from controller-only parts like the LTC3811 as it integrates the power stage. The EUDD suffix denotes the specific QFN-24 package variant, differentiating it from tape-and-reel versions such as the LT8611EUDD#TRPBF.

Replacement Considerations

LT8611EUDD#TRPBF serves as the same functional device but in a tape-and-reel package format instead of tube packaging.