LT3840EFE#PBF

Overview

The LT3840EFE#PBF is a high voltage synchronous step-down switching regulator controller from Analog Devices. It operates from a 2.5V to 60V supply and delivers up to 20A output current. The device features a fixed 1MHz switching frequency, adjustable duty cycle up to 99%, and low quiescent current of 6µA. It supports buck and inverting topologies with outputs ranging from 1.25V to 60V. Packaged in a TSSOP-EP-28, it functions within a temperature range of -55°C to +150°C.

Feature Summary

• Synchronous rectification capability for improved efficiency
• Integrated clock synchronization function
• Built-in soft start and tracking control features
• Power good status indication

Applications

• Industrial power supplies
• Telecommunications infrastructure
• Point-of-load regulation modules
• Automotive electronics systems

Procurement Notes

Verify the specific suffix #PBF confirms lead-free RoHS compliance and tube packaging format. Confirm the EFE variant matches the required 28-pin TSSOP thermal pad package. Ensure the MPFE industrial grade or EFE commercial grade aligns with operational temperature requirements. Cross-reference the DC1909A development kit availability for design validation before final procurement commitment.

Selection Notes

Select this component when wide input voltage ranges up to 60V are required alongside high current delivery capabilities. The synchronous architecture suits applications demanding high efficiency at moderate to heavy loads. Consider the 1MHz frequency for balancing component size against transient response needs. Evaluate the TSSOP-EP-28 package for adequate thermal dissipation in dense PCB layouts.

Part Context

This part belongs to the LT3840 series of high voltage synchronous regulators. It complements other Analog Devices PMIC solutions by offering robust performance in demanding environments. The series includes variants like LT3845 for different pin counts and current limits, providing flexibility for diverse system architectures requiring reliable power management.

Replacement Considerations

LT3840MPFE#PBF serves as an industrial temperature grade alternative within the same family.