LT8494IUF#TRPBF

Overview

The LT8494IUF#TRPBF is an automotive-grade, monolithic DC-DC converter featuring a high-voltage synchronous boost and SEPIC topology. It integrates a 70V switch capable of delivering up to 2A output current. The device operates from input voltages ranging from 1V to 32V, supporting wide input ranges for battery-powered applications. It provides an adjustable output voltage range from 1.202V to 70V with a fixed switching frequency of 1.5MHz. Packaged in a thermally enhanced 28-pin QFN, it ensures reliable performance across the -40°C to +125°C junction temperature range.

Feature Summary

• Integrates a high-voltage 70V synchronous switch for robust step-up and SEPIC conversion capabilities
• Supports single-cell lithium-ion or multi-cell battery inputs starting as low as 1V
• Includes internal compensation and soft-start circuitry to simplify external component requirements
• Features thermal shutdown protection and cycle-by-cycle current limiting for system reliability

Applications

• Automotive infotainment and display backlight power supplies
• Battery-operated industrial sensor nodes requiring wide input ranges
• Single-cell lithium-ion boost converters for portable medical devices
• Multi-cell battery charging systems utilizing SEPIC topology

Procurement Notes

Verify the specific suffix 'IUF#TRPBF' to confirm the 28-lead QFN package and tape-and-reel shipping format. Ensure the order specifies the Automotive grade variant if operating within automotive environments. Cross-reference the manufacturer's latest datasheet for any pinout revisions or updated environmental compliance statements prior to finalizing procurement contracts.

Selection Notes

Select this component when designing circuits that require driving loads from deeply discharged single-cell batteries or multiple series cells. The integrated 70V switch allows for higher output voltages compared to standard 60V controllers. Consider the 28-pin QFN package for its thermal performance in space-constrained designs. Evaluate the 1.5MHz switching frequency against EMI constraints and inductor size requirements for the target application.

Part Context

This part belongs to the LT8494 family of high-voltage DC/DC converters designed by Analog Devices. It complements other members like the LT8494EFE by offering a different package option while maintaining identical electrical specifications. The family targets applications needing efficient power conversion from low-voltage sources to higher voltage rails in compact form factors.

FAQ

What is the maximum output voltage capability of the LT8494IUF?

The device supports an adjustable output voltage range up to 70V, limited by the breakdown voltage of the integrated high-side switch.

Does the LT8494IUF support SEPIC operation?

Yes, the LT8494IUF is a monolithic solution that supports both Boost and SEPIC topologies, making it suitable for input voltages that may rise above or fall below the desired output voltage.