LT8640IUDC-1#TRPBF

Overview

The LT8640IUDC-1#TRPBF is a synchronous step-down DC/DC converter from Analog Devices, part of the Silent Switcher family. It operates with an input voltage range of 2.9V to 42V and delivers up to 5A of output current. The device features an adjustable output voltage from 970mV to 41.58V and supports switching frequencies between 200kHz and 3MHz. It includes integrated Schottky diodes for low EMI performance and offers a quiescent current of 1.7µA. Packaged in a 20-QFN (3x4mm) with exposed pad, it is rated for operation from -40°C to +125°C junction temperature.

Feature Summary

• Integrates high-side and low-side power switches with internal Schottky diodes to minimize external component count and electromagnetic interference.
• Provides programmable switching frequency allowing optimization for efficiency or transient response requirements.
• Features ultra-low no-load supply current to enhance battery life in portable applications.
• Includes comprehensive protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Applications

• Industrial automation controllers
• Distributed power systems
• Point-of-load regulation

Procurement Notes

Verify the specific suffix '-1' indicates the correct variant for your design requirements. Confirm package type matches the 20-QFN footprint. Check RoHS compliance status if required by your manufacturing standards. Ensure the supplier provides valid traceability documentation for automotive or industrial grade parts.

Selection Notes

Select this component when a wide input voltage range up to 42V is required alongside high efficiency. Consider the Silent Switcher technology for applications sensitive to radiated emissions without external shielding. Evaluate the 5A continuous current capability against peak load demands. Compare switching frequency options to balance size and efficiency needs.

Part Context

This part belongs to the LT8640 series of Silent Switcher regulators. It shares architectural similarities with other members like the LT8640IUDC but may differ in specific electrical characteristics or packaging options. The series is designed for high-density power conversion in space-constrained environments.

Replacement Considerations

LT8640IUDC#TRPBF

FAQ

What is the maximum input voltage supported?

The device supports a maximum input voltage of 42V.

Does the IC include internal Schottky diodes?

Yes, the LT8640 integrates internal Schottky diodes to reduce EMI and simplify the design.