LT3741IUF-1#PBF

Overview

The LT3741IUF-1#PBF is a fixed frequency synchronous step-down DC/DC controller from Analog Devices. It operates with an input voltage range of 6V to 36V and supports output voltages from 4V to 34V. The device regulates output current up to 25A at a switching frequency of 1MHz. It features a quiescent current of 1.8mA and functions within a temperature range of -40°C to +125°C. The component is housed in a 20-QFN (4x4) package.

Feature Summary

• Synchronous buck topology for high-efficiency power conversion
• Integrated constant current regulation capability
• Clock synchronization support for multi-phase systems

Applications

• High-power point-of-load regulation
• Industrial power supply systems
• Telecommunications infrastructure equipment

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when sourcing. Confirm the IUF designation corresponds to the QFN package variant. Ensure compatibility with 1MHz operation requirements. Check RoHS compliance status against latest manufacturer declarations. Validate thermal performance specifications for the intended application environment.

Selection Notes

Select this controller for applications requiring precise current regulation alongside voltage control. The 1MHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the 25A current capability for heavy load scenarios. Evaluate thermal dissipation needs due to the synchronous design. Ensure input voltage stays within the 6V to 36V operational window.

Part Context

This component belongs to the LT3741 family of synchronous step-down controllers. It is designed for high-current applications where efficiency and accuracy are critical. The device integrates drivers for external N-channel MOSFETs. It offers robust protection features and flexible configuration options for various power architectures.

Replacement Considerations

LT3741IFE-1#PBF is a documented alternative in the TSSOP-20 package.