LT3976EMSE#PBF

Overview

The LT3976EMSE#PBF is a high-efficiency, wide input voltage range synchronous step-down DC/DC converter from Analog Devices. It operates with an input voltage range of 2.8V to 60V and delivers up to 4A of output current. The device integrates a 150mΩ N-channel power switch and a 180mΩ synchronous rectifier. It supports adjustable switching frequencies from 100kHz to 2MHz. Key features include constant frequency peak current mode control, programmable soft-start, and comprehensive protection mechanisms such as over-current, over-voltage, and thermal shutdown.

Feature Summary

• Wide input voltage capability supporting diverse power sources
• Integrated high-side and low-side power switches for compact design
• Constant frequency peak current mode control for stable regulation
• Programmable soft-start to limit inrush current during startup

Applications

• Industrial automation systems requiring robust power conversion
• Automotive electronics operating under varying battery voltages
• Point-of-load regulation in telecommunications infrastructure
• Battery-powered equipment needing efficient step-down conversion

Procurement Notes

Verify the specific suffix PBF indicates lead-free compliance when sourcing. Confirm the EMSE package type matches your PCB footprint requirements. Ensure the manufacturer part number matches exactly to avoid counterfeit components. Check for RoHS compliance documentation if required by your region. Validate that the supplier provides genuine Analog Devices Inc. products with traceability.

Selection Notes

Select this component when input voltages exceed standard LDO limits or require wide dynamic ranges. Consider the 4A current capacity for moderate load applications. Evaluate the switching frequency options against EMI constraints and passive component size requirements. Assess thermal performance based on ambient conditions and PCB copper area available for heat dissipation.

Part Context

This part belongs to the LT3976 family of high-voltage synchronous buck converters. It shares architectural similarities with other members but differs in package and temperature grade. The EMSE designation specifies the MSOP-10E package variant. This series targets applications demanding high efficiency across broad input voltage spans without external MOSFETs.

Replacement Considerations

Direct replacements may include other Analog Devices high-voltage buck converters like the LT3975 or LT3977, depending on current and package needs. Verify pin compatibility and electrical specifications before substitution. Cross-reference with competitors only if functional equivalence is confirmed through detailed datasheet comparison.