LT8390AEUFD#TRPBF

Overview

The LT8390AEUFD#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 a programmable switching frequency between 600 kHz and 2 MHz, enabling optimization for size and efficiency. It includes integrated soft start, current limit, and phase control capabilities. The component is housed in a 28-QFN (4x5 mm) package and is rated for operation within a junction temperature range of -40°C to +125°C.

Feature Summary

• Synchronous four-switch topology supporting buck, boost, and buck-boost modes
• Proprietary peak-buck peak-boost current mode control scheme
• Integrated phase control for multi-phase parallel operation
• Programmable switching frequency up to 2 MHz

Applications

• Industrial automation systems requiring wide input voltage ranges
• Distributed power architectures in telecom infrastructure
• Battery-powered equipment with variable source voltages
• Automotive electronics operating under fluctuating line conditions

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm that the AE grade meets the required thermal and electrical specifications for the target application environment. Ensure compatibility with the intended PCB footprint for the 28-QFN package. Cross-reference the datasheet revision date to confirm feature availability and electrical characteristics match design requirements.

Selection Notes

Select this controller for applications demanding regulation regardless of whether the input voltage is higher, lower, or equal to the output voltage. The four-switch architecture allows for efficient energy transfer in both step-up and step-down scenarios. Consider the programmable frequency range to balance electromagnetic interference (EMI) performance against external component size. Evaluate the need for phase control if multiple units are paralleled to reduce input and output capacitance requirements.

Part Context

The LT8390A belongs to a family of synchronous buck-boost controllers designed for robust performance in challenging power environments. Unlike standard buck or boost converters, this device maintains regulation across the entire transition zone between input and output voltages. The EUFD variant specifically denotes the QFN package configuration, while the TRPBF suffix confirms the reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

LT8390AIUFD#TRPBF

FAQ

How does the LT8390AEUFD#TRPBF handle transitions between buck and boost modes?

It utilizes a proprietary peak-buck peak-boost current mode control scheme that seamlessly transitions between modes without discontinuity, maintaining stable regulation as the input voltage crosses the output voltage threshold.

Is the LT8390AEUFD#TRPBF capable of multi-phase operation?

Yes, the controller includes integrated phase control features that allow it to be synchronized and phased with other devices to support multi-phase parallel configurations for higher current delivery.