LT8641IUDC#PBF

Overview

The LT8641IUDC#PBF is a synchronous step-down Silent Switcher regulator from Analog Devices, housed in a 20-WFQFN package with an exposed thermal pad. It supports an input voltage range of 3V to 65V and delivers up to 3.5A of output current. The adjustable output voltage spans from 0.8V to 64.35V. Operating frequencies are selectable between 210kHz and 2MHz. The device maintains a low quiescent current of 1.7µA and functions reliably within a junction temperature range of -40°C to +125°C.

Feature Summary

• Silent Switcher architecture minimizes EMI/EMC radiation without external filters
• Integrated synchronous buck topology for high efficiency
• Wide input voltage capability suitable for industrial applications

Applications

• Industrial power supplies
• Point-of-load regulation
• Battery-powered equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS compliance. Confirm the QFN-20 package dimensions match your PCB footprint requirements. Ensure the operating temperature grade meets your system's thermal constraints. Cross-reference the datasheet revision date to confirm feature consistency before finalizing procurement specifications.

Selection Notes

Select this component when input voltages exceed standard 42V limits but require compact form factors. The Silent Switcher technology is essential for noise-sensitive environments where radiated emissions must be controlled. Evaluate thermal performance based on the exposed pad design for adequate heat dissipation in enclosed spaces.

Part Context

This part belongs to the LT8640/LT8641 Silent Switcher family designed for high-efficiency DC-DC conversion. It shares architectural similarities with the LT8640 but offers distinct current ratings and input voltage ranges. The series emphasizes compact solutions for demanding power management tasks.

Replacement Considerations

LT8641IUDC#TRPBF serves as the tape-and-reel alternative for automated assembly processes.