LT8390HFE#PBF

Overview

The LT8390HFE#PBF is a synchronous four-switch buck-boost DC/DC controller from Analog Devices Inc., housed in a 28-TSSOP-EP package. It operates with an input voltage range of 4 V to 60 V and supports switching frequencies between 150 kHz and 650 kHz. The device features a maximum duty cycle of 95% and maintains a typical quiescent current of 2.1 mA. It is designed for high-efficiency power conversion across varying input and output conditions, supporting positive outputs up to 60 V.

Feature Summary

• Synchronous four-switch topology enables seamless buck, boost, and pass-through operation regardless of input versus output voltage relationships.
• Proprietary peak-buck/peak-boost current mode control provides precise regulation of output voltage, input current, or output current.
• Integrated clock synchronization allows external frequency alignment to reduce system-wide electromagnetic interference.

Applications

• Automotive infotainment and body electronics systems requiring wide input voltage tolerance
• Industrial power supplies operating under fluctuating line conditions
• Battery-powered equipment utilizing single-cell lithium-ion or lead-acid sources

Procurement Notes

Verify the specific suffix #PBF indicates lead-free RoHS-compliant packaging when sourcing components. Confirm that the H-grade designation aligns with the required extended temperature range specifications for your application environment. Cross-reference the datasheet revision history to ensure compatibility with existing design documentation and manufacturing processes.

Selection Notes

Select this component when designing circuits that demand continuous current flow during transitions where input voltage equals or crosses the output voltage level. Evaluate thermal performance requirements carefully, as the TSSOP-EP package relies on the exposed pad for heat dissipation. Ensure external passive component selection supports the chosen switching frequency and current limits defined by the load profile.

Part Context

This part belongs to the LT8390 family of synchronous buck-boost controllers. It shares architectural similarities with the LT8390IFE#PBF but differs in temperature rating and specific electrical characteristics. The series is designed to eliminate switching noise transfer between input and output ports, distinguishing it from traditional linear regulators or standard switching topologies.

Replacement Considerations

LT8390IFE#PBF serves as a related variant within the same product family, offering similar functionality with potentially different temperature or electrical specifications.