LT8640SIV#TRPBF

Overview

The LT8640SIV#TRPBF is a synchronous step-down DC/DC converter from Analog Devices, part of the Silent Switcher 2 family. It delivers a continuous output current of 6 A with a peak capability of 7 A. The device supports an input voltage range from 3.4 V to 42 V and provides an adjustable output voltage between 0.97 V and 41.58 V. It features a programmable switching frequency ranging from 200 kHz to 3 MHz and operates within a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrates Silent Switcher 2 architecture to minimize electromagnetic interference without requiring external ferrite beads or shielded inductors.
• Utilizes a flip-chip LQFN package design that incorporates multiple large ground exposed pads for efficient thermal dissipation through the PCB.
• Includes integrated bootstrap diodes and high-side gate drivers to simplify external component count and reduce board space requirements.

Applications

• Automotive infotainment systems and body control modules
• Industrial distributed power architectures
• Point-of-load regulation for processors and FPGAs

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and reel specifications. Ensure compatibility with required operating temperatures and regulatory standards such as AEC-Q100 if automotive qualification is necessary. Cross-reference datasheet revisions to confirm pinout consistency before finalizing procurement orders.

Selection Notes

Select this component when high efficiency and low EMI are critical constraints in compact designs. The wide input voltage range accommodates various bus voltages, while the adjustable frequency allows optimization for size versus performance trade-offs. Evaluate thermal requirements based on the specific load current and ambient conditions to ensure adequate heat sinking via the PCB.

Part Context

This part belongs to the LT8640S series, which shares architectural similarities with other Silent Switcher devices but offers specific current ratings and packaging options. It serves as a robust solution for applications demanding reliable power conversion in electrically noisy environments, distinguishing itself through advanced layout techniques inherent to its package design.

Replacement Considerations

LT8640SEV#TRPBF

FAQ

Does the LT8640SIV require external Schottky diodes?

No, the device integrates synchronous rectification, eliminating the need for external catch diodes.

What is the maximum input voltage supported?

The maximum input voltage is 42 V.