LT3741EFE-1#TRPBF

Overview

The LT3741EFE-1#TRPBF is a high-power, constant current/constant voltage step-down controller from Analog Devices. It operates with an input voltage range of 6 V to 36 V and supports output voltages from 4 V to 34 V. The device delivers up to 25 A output current with a switching frequency adjustable between 200 kHz and 1 MHz. It features a quiescent current of 1.8 mA and functions within a temperature range of -40°C to +125°C. Packaged in a 20-TSSOP-EP surface-mount format, it includes integrated soft-start and clock synchronization capabilities for robust power management.

Feature Summary

• Integrated synchronous rectification driver for high-efficiency buck conversion
• Programmable switching frequency allows optimization for size and performance
• Built-in soft-start control limits inrush current during power-up

Applications

• High-power LED lighting drivers requiring constant current regulation
• Industrial point-of-load DC-DC conversion systems
• Battery charging applications utilizing constant current/constant voltage profiles

Procurement Notes

Verify the specific suffix #TRPBF confirms the tape-and-reel packaging configuration required for automated assembly processes. Ensure the component matches the TSSOP-EP package outline dimensions and thermal pad specifications. Confirm that the -1 variant designation aligns with the intended constant current control architecture. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity and revision status before integration.

Selection Notes

Select this controller when designing synchronous buck converters requiring precise current regulation alongside voltage control. The wide input voltage range suits various bus architectures. Consider the thermal performance of the exposed pad TSSOP package for heat dissipation requirements. Evaluate the external component count needed for the chosen switching frequency to balance efficiency and board space constraints.

Part Context

This component belongs to the LT3741 series of high-performance power management ICs. It serves as a specialized controller rather than a complete regulator, requiring external MOSFETs and passive components. The series is designed for demanding applications where efficiency and thermal management are critical. It complements other PMIC solutions by offering dedicated control logic for complex power topologies.

Replacement Considerations

LT3741EFE#TRPBF

FAQ

Does the LT3741EFE-1#TRPBF include internal power switches?

No, it is a controller that requires external synchronous MOSFETs to be connected to its drive pins.

What is the purpose of the -1 suffix in the part number?

The -1 suffix indicates the specific pinout and functional configuration optimized for constant current applications.