LT8390HUFD#TRPBF

Overview

The LT8390HUFD#TRPBF is a synchronous 4-switch buck-boost controller from Analog Devices Inc., designed for high-efficiency DC-DC conversion. It operates with an input voltage range of 4 V to 60 V and supports output voltages up to 60 V. The device features a switchable switching frequency between 150 kHz and 650 kHz, with typical operation around 190 kHz to 630 kHz depending on configuration. It utilizes a 28-WFQFN (4x5 mm) package with exposed pad for thermal management. Key electrical parameters include a quiescent current of 2.1 mA and a maximum duty cycle of 95%. The controller includes integrated soft-start, current limit, and clock synchronization capabilities.

Feature Summary

• Synchronous four-switch buck-boost topology enables seamless transition between step-up and step-down modes without discontinuity in output current.
• Integrated pass-thru capability eliminates switching noise during direct battery-to-load connections, improving efficiency in specific operating conditions.
• Programmable switching frequency allows optimization for efficiency or size, supporting frequencies from 150 kHz to 650 kHz.
• Clock synchronization feature permits external clock injection to avoid audible noise or system interference.

Applications

• Industrial power supplies requiring wide input voltage ranges
• Battery-powered equipment needing stable output across varying cell states
• Automotive electronics systems with fluctuating supply voltages
• Distributed power architectures in telecom infrastructure

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors. Confirm lot traceability and material declaration compliance with RoHS standards. Ensure storage conditions maintain moisture sensitivity level ratings prior to reflow soldering. Cross-reference ordering part numbers carefully as suffixes may indicate packaging variations such as tube versus reel formats without altering functional specifications.

Selection Notes

Select this controller when wide input voltage coverage and bidirectional energy flow are required. Evaluate thermal performance based on PCB copper area connected to the exposed pad. Consider external component selection for inductor value and capacitor ratings relative to the chosen switching frequency. Verify that the application load profile remains within the controller's current limit boundaries to ensure stable regulation.

Part Context

The LT8390 series represents Analog Devices' solution for complex power conversion tasks where traditional buck or boost converters fall short. This specific variant belongs to the HU sub-series, indicating extended temperature grade options. It complements other PMIC offerings by addressing applications demanding high reliability and compact form factors in harsh environments.

Replacement Considerations

LT8390IUFD#TRPBF serves as a commercial grade alternative within the same family. LT8390AIFE#TRPBF offers higher switching frequency options at 2 MHz. Direct pin-compatible substitutes require verification against updated datasheets for parameter deviations.