LT8390AHFE#TRPBF

Overview

The LT8390AHFE#TRPBF is a synchronous four-switch buck-boost DC/DC controller manufactured by Analog Devices Inc. It supports an input voltage range of 4V to 60V and delivers a positive output voltage from 0V to 60V. The device operates with a switching frequency between 600kHz and 2MHz, featuring clock synchronization capabilities. It utilizes a 28-TSSOP-EP package with exposed pad for surface mount installation. The controller includes integrated soft start, current limit, and ramp compensation features, operating reliably within a junction temperature range of -40°C to +150°C.

Feature Summary

• Synchronous four-switch topology enabling seamless buck and boost operation across wide input and output voltage ranges.
• Clock synchronization capability allows multiple devices to operate in parallel without audible noise or beat frequencies.
• Integrated pass-through mode eliminates switching noise during direct battery-to-load connections.
• Comprehensive protection features including soft start, cycle-by-cycle current limiting, and thermal shutdown.

Applications

• Automotive infotainment and body control modules requiring wide input voltage tolerance
• Industrial distributed power systems with varying supply rails
• Battery-powered equipment needing stable output despite cell discharge curves
• USB Type-C power delivery solutions

Procurement Notes

Verify the suffix TRPBF indicates tape and reel packaging when ordering. Confirm the AH grade specifies the extended maximum junction temperature rating of +150°C compared to standard variants. Ensure the 28-TSSOP-EP footprint matches the target PCB layout. Cross-reference the manufacturer part number directly with Analog Devices documentation to avoid confusion with similar pinout configurations.

Selection Notes

Select this component when designing systems requiring high efficiency across both step-up and step-down conditions. The wide input range suits applications fed directly from batteries or unregulated sources. Consider the exposed pad thermal performance for high-current designs. Evaluate the need for clock synchronization if multiple converters share a board space. Verify that the external component selection aligns with the specified frequency range for optimal transient response.

Part Context

This part belongs to the LT8390 family of synchronous buck-boost controllers designed for high-performance power management. It distinguishes itself through its ability to handle extreme input voltage variations while maintaining regulation. The specific variant integrates advanced features like pass-through mode to reduce electromagnetic interference in sensitive environments.

Replacement Considerations

LT8390AEFE#PBF offers identical functionality but uses tube packaging instead of tape and reel. LT8390AIFE#TRPBF provides the same electrical specifications and reel packaging but may differ in thermal grading or specific manufacturing lot characteristics. Verify pin compatibility before substitution.