LT3845AIFE#PBF

Overview

The LT3845AIFE#PBF is a high voltage synchronous current mode buck 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 between 100kHz and 500kHz, which can be synchronized up to 600kHz. Quiescent current is specified at 120uA. It utilizes a 16-lead TSSOP-EP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• High voltage synchronous step-down control architecture
• Programmable or externally synchronized switching frequency
• Selectable operation modes including Burst Mode for light load efficiency

Applications

• Industrial control systems
• Telecom power supplies
• Distributed power architectures

Procurement Notes

Verify the specific suffix #PBF indicates a tube package variant distinct from the TRPBF reel version. Confirm the leaded TSSOP-EP package matches the target PCB footprint. Ensure the component grade aligns with the required operating temperature range specifications before finalizing procurement orders.

Selection Notes

Select this controller for applications requiring wide input voltage ranges up to 60V. Consider the 15A capability and adjustable frequency for optimizing magnetic component size. Evaluate the need for synchronization against potential EMI constraints in dense environments when choosing this part over fixed-frequency alternatives.

Part Context

This component belongs to the LT3845A series of high voltage synchronous buck controllers. It is designed for medium to high power supplies where efficiency across varying loads is critical. The series offers flexibility through programmable frequency and selectable conduction modes to adapt to diverse system requirements.

Replacement Considerations

LT3845AIFE#TRPBF serves as the tape and reel equivalent of this tube-packaged part.