LT8640IUDC#PBF

Overview

The LT8640IUDC#PBF is a synchronous step-down Silent Switcher regulator from Analog Devices, housed in a 20-WFQFN package. It supports an input voltage range of 3.4 V to 42 V and delivers up to 5 A of output current. The adjustable output voltage spans from 970 mV to 41.9 V. Operating with a switch frequency between 200 kHz and 3 MHz, the device maintains a quiescent current of 1.7 uA. It functions reliably within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrates Silent Switcher technology to minimize electromagnetic interference radiation without requiring external ferrite beads.

Applications

• Industrial distributed power systems
• Point-of-load regulation for high-density circuits
• Automotive electronics requiring robust input ranges

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer datasheets. Check for obsolescence notices or lifecycle changes directly from Analog Devices before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring high efficiency and low EMI in compact spaces. Ensure the thermal design accommodates the QFN-18 package constraints. Verify that the required output voltage falls within the specified 970 mV to 41.9 V range for optimal performance.

Part Context

This part belongs to the LT8640 family of Silent Switcher regulators. It shares architectural similarities with other members like the LT8640HUDC-1#PBF but differs in operating temperature specifications and package variants. The series focuses on reducing board space while maintaining high power density.

Replacement Considerations

LT8640IUDC-1#PBF offers extended temperature capabilities compared to the standard I-grade variant.