LT8390AEUFD#PBF

Overview

The LT8390AEUFD#PBF is a synchronous four-switch buck-boost DC/DC controller manufactured by Analog Devices Inc. It operates within 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 adjustable between 600 kHz and 2 MHz, incorporating spread spectrum modulation to reduce EMI. It delivers ±1.5% output voltage accuracy for loads between 1 V and 60 V and maintains ±3% current accuracy. The quiescent current is specified at 2.1 mA, with a load regulation of 1%. The component functions reliably across an operating temperature range of -40°C to +125°C and is housed in a 28-lead QFN package.

Feature Summary

• Synchronous four-switch topology enabling efficient step-up, step-down, and pass-through operation
• Integrated spread spectrum modulation for electromagnetic interference reduction
• High precision voltage and current regulation capabilities
• Wide input and output voltage handling range

Applications

• Industrial power supply systems requiring wide input ranges
• Battery-powered equipment utilizing single-cell lithium-ion configurations
• Automotive electronics demanding robust voltage regulation
• Telecommunications infrastructure power management

Procurement Notes

Verify the specific suffix 'EUFD' confirms the A-grade industrial temperature rating and tube packaging format. Ensure the '#PBF' designation indicates lead-free compliance and RoHS adherence. Cross-reference the manufacturer datasheet for exact pinout definitions and thermal pad requirements. Confirm availability status as distribution channels may report limited stock or restricted sales regions. Validate that the ordering code matches the required frequency and accuracy specifications.

Selection Notes

Select this controller when designing systems requiring a single-stage solution for varying battery levels or line conditions. The wide 4 V to 60 V input range accommodates diverse source types without additional pre-regulation stages. Consider the 2 MHz maximum frequency for minimizing passive component size while managing thermal dissipation. Evaluate the 2.1 mA quiescent current against system standby power constraints. Ensure the QFN-28 package fits the available PCB real estate and thermal design parameters.

Part Context

This component belongs to the LT8390 family of high-voltage synchronous buck-boost controllers. It shares architectural similarities with the LT8391, which is optimized for LED driving applications. The LT8390 series provides a versatile foundation for general-purpose power conversion where input and output voltages may cross each other. It complements Analog Devices' portfolio of advanced PMIC solutions for complex power management needs.

Replacement Considerations

LT8390AIUFD#PBF offers identical electrical performance with an extended maximum junction temperature rating of 150°C compared to the 125°C limit of the AE variant.