LT3840HFE#PBF

Overview

The LT3840HFE#PBF is a high-voltage synchronous step-down switching regulator controller from Analog Devices, designed for robust power management in demanding environments. It operates from a wide input voltage range of 2.5V to 60V, supporting output voltages from 1.25V to 60V with up to 20A output current capability. The device features a fixed 1MHz switching frequency and ultra-low quiescent current of 6µA, enhancing efficiency. It utilizes a TSSOP-EP-28 package and supports Buck and Inverting topologies. Operating temperatures span from -55°C to +150°C, ensuring reliability across extreme conditions.

Feature Summary

• Supports wide input voltage range from 2.5V to 60V for flexible power sourcing
• Integrates accurate current limit functionality for precise load protection
• Features low quiescent current operation to maximize system efficiency
• Capable of driving external N-channel MOSFETs for synchronous rectification

Applications

• Industrial automation power supplies
• Telecommunications infrastructure equipment
• Distributed power systems requiring high voltage inputs
• Automotive electronics operating in harsh thermal environments

Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm temperature grade and packaging configuration. Ensure compatibility with required thermal dissipation solutions given the exposed pad package type. Cross-reference pinout assignments with target PCB layout designs to prevent interface mismatches during integration.

Selection Notes

Select this component when designing systems requiring high input voltage tolerance and precise current limiting without integrated switches. Evaluate thermal performance requirements carefully due to the controller's role in managing external power stages. Confirm that the application benefits from the wide operating temperature range and low standby current characteristics provided by this specific controller architecture.

Part Context

This part belongs to the LT3840 family of high-voltage synchronous buck controllers. It serves as a core power management IC for applications needing efficient DC-DC conversion from high voltage rails. The HFE variant specifically denotes the industrial temperature grade and tube packaging format, distinguishing it from other commercial or tape-and-reel options within the same functional family.

Replacement Considerations

LT3840MPFE#PBF offers military-grade temperature specifications while maintaining identical electrical functionality and pinout compatibility.