LT8390AEFE#TRPBF

Overview

The LT8390AEFE#TRPBF is a synchronous four-switch buck-boost DC/DC controller from Analog Devices, designed for high-efficiency power conversion across varying input and output voltage conditions. It operates with an input voltage range of 4 V to 60 V and supports output voltages from 0 V to 60 V. The device features an adjustable switching frequency between 600 kHz and 2 MHz, enabling optimization for size and efficiency. Key electrical parameters include a maximum static current of 2.1 mA and load regulation of 1%. It functions within a temperature range of -40°C to +125°C and is housed in a 28-lead TSSOP-EP package.

Feature Summary

• Synchronous four-switch topology enables seamless transition between buck, boost, and pass-through modes without switching noise during pass-through operation.
• Integrated clock synchronization allows multiple controllers to operate in phase or spread spectrum to reduce EMI.
• Supports external current sensing for precise input and output current limiting protection.
• Includes programmable soft-start and shutdown capabilities for controlled power sequencing.

Applications

• Automotive infotainment and lighting systems requiring wide input voltage ranges
• Industrial distributed power architectures with battery or line variations
• Telecommunications equipment utilizing 48V or 24V bus systems
• Portable devices with single-cell lithium-ion battery inputs

Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging distinct from tube variants like #PBF. Confirm RoHS compliance status through official documentation. Ensure the specific grade (A) matches thermal and performance requirements. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Check for recent product change notifications regarding epoxy or wafer fab site changes.

Selection Notes

Select this controller when input voltage may rise above or fall below the desired output voltage. The four-switch architecture provides bidirectional current flow capability essential for buck-boost applications. Consider the 28-TSSOP-EP package for adequate thermal dissipation and exposed pad grounding. Evaluate the need for clock synchronization if multiple converters are present in the system to manage electromagnetic interference.

Part Context

This component belongs to the LT8390 family of synchronous buck-boost controllers. The 'A' designation typically denotes an enhanced or specific grade variant within the series. The '#TRPBF' suffix specifies the reel packaging format for automated surface-mount assembly, differing from the tube-packaged '#PBF' version which shares identical electrical characteristics.

Replacement Considerations

LT8390AIFE#TRPBF: Identical electrical specifications with different packaging (reel vs tube for AEFE). LT8390EFE#PBF: Non-A grade variant with potentially different thermal or reliability ratings. LT8391EFE#PBF: LED-specific driver variant; not electrically compatible for general DC/DC regulation.