LT1949IS8#TRPBF

Overview

The LT1949IS8#TRPBF is a high-efficiency, synchronous step-down DC-DC converter manufactured by Analog Devices Inc. It integrates a 2A switch and operates with an input voltage range of 3V to 36V. The device delivers adjustable output voltages from 0.8V to 30V with a maximum output current of 2A. Key electrical specifications include a switching frequency selectable between 500kHz and 1.5MHz, quiescent current of 170µA, and peak efficiency up to 96%. It features thermal foldback protection, soft start, and power good indication, housed in a thermally enhanced 8-lead SOIC package.

Feature Summary

• Integrates high-side and low-side N-channel power switches for improved efficiency
• Supports wide input voltage range suitable for various power bus architectures
• Includes thermal foldback protection to limit junction temperature under overload
• Provides programmable switching frequency and soft-start functionality

Applications

• Point-of-load regulation for industrial equipment
• Battery-powered systems requiring efficient step-down conversion
• Distributed power architectures in telecommunications
• Embedded systems with microprocessors or FPGAs

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the IS8 designation corresponds to the standard commercial temperature grade and SOIC-8 package variant. Cross-reference the manufacturer's latest datasheet revision to ensure compliance with current RoHS standards and material declarations before finalizing procurement orders.

Selection Notes

Select this component when designing circuits requiring high efficiency at moderate load currents within a wide input voltage window. Consider the 500kHz to 1.5MHz frequency range to balance component size against switching losses. Ensure the application environment supports the specified operating temperature range and verify that the thermal performance of the PCB layout meets the junction temperature requirements under maximum load conditions.

Part Context

This part belongs to the LT1949 family of synchronous buck converters designed for high-efficiency power management. It complements other Analog Devices regulators by offering integrated power switches and robust protection features. The series targets applications needing reliable DC-DC conversion without external MOSFETs, simplifying design complexity while maintaining compact form factors in modern electronic systems.

Replacement Considerations

LT1949EMS8#TRPBF