LT3845AEFE#PBF

Overview

The LT3845AEFE#PBF is a high voltage synchronous current mode step-down controller from Analog Devices. It operates with an input voltage range of 4V to 60V and supports up to 15A output current. The device features a programmable switching frequency from 100kHz to 500kHz, which can be synchronized up to 600kHz. It utilizes a TSSOP-16 package and maintains a quiescent current of 120uA. The controller offers adjustable operation modes including Burst Mode for light load efficiency and continuous current mode for constant frequency performance.

Feature Summary

• Synchronous current mode control architecture for high efficiency power conversion
• Programmable switching frequency with external synchronization capability
• Selectable operational modes including Burst Mode for improved light load performance

Applications

• Industrial control systems
• Telecom power supplies
• High voltage DC/DC step-down converters

Procurement Notes

Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm the specific suffix matches the required package and temperature grade. Check for restricted supply status updates as availability may fluctuate. Ensure proper handling procedures are followed for surface mount components. Validate that the procurement source provides original manufacturer documentation.

Selection Notes

Select this controller for applications requiring wide input voltage ranges up to 60V. Consider the 15A current capability for medium to high power designs. Evaluate the need for synchronization features in multi-phase systems. Assess thermal requirements based on the TSSOP-16 package. Determine if Burst Mode operation aligns with efficiency targets at light loads.

Part Context

This part belongs to the LT3845A series of high voltage synchronous buck controllers. It complements other Analog Devices power management solutions by providing robust control for step-down topologies. The series is designed for industrial and telecom environments requiring reliable performance under varying load conditions.

Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers. Cross-reference pinouts and electrical specifications before substitution. Ensure compatibility with existing PCB layouts and thermal designs.