LT3508EFE#TRPBF

Overview

The LT3508EFE#TRPBF is a dual-channel synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.7V to 36V and provides two adjustable outputs, each capable of delivering up to 1.4A. The device integrates high-side and low-side N-channel power switches for efficient conversion. It features a fixed internal switching frequency of 2.5MHz, allowing for the use of small external inductors and capacitors. The IC supports parallel operation for increased current capability and includes comprehensive protection features such as thermal shutdown and cycle-by-cycle current limiting.

Feature Summary

• Dual-channel synchronous buck topology with integrated high-side and low-side N-channel power switches
• Fixed 2.5MHz switching frequency enabling compact passive component selection
• Supports output voltage scaling via resistor divider network for precise regulation
• Includes thermal shutdown and cycle-by-cycle current limiting for system protection

Applications

• Point-of-load regulation for digital signal processors and field-programmable gate arrays
• Power distribution networks in industrial control systems
• Battery-powered equipment requiring efficient voltage conversion from single-cell lithium sources
• Telecommunications infrastructure powering baseband processing units

Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging compatible with automated assembly processes. Confirm the EFE package designation corresponds to the 16-lead TSSOP with exposed pad thermal enhancement. Ensure RoHS compliance documentation aligns with current environmental regulations for the specific manufacturing lot. Cross-reference the manufacturer part number against official Analog Devices databases to validate authenticity and revision status before integration into production designs.

Selection Notes

Select this component when designing circuits requiring two independent regulated rails from a common bus voltage within the 3.7V to 36V range. The 2.5MHz frequency is optimal for minimizing solution size compared to lower-frequency alternatives. Consider the thermal performance of the 16-TSSOP-EP package relative to the expected load current and ambient conditions. Evaluate the need for external synchronization if electromagnetic interference constraints require shifting the switching frequency away from the default setting.

Part Context

This part belongs to the LT3508 family of dual synchronous buck regulators designed for high-efficiency power management. It shares architectural similarities with other members of the series but differs in package configuration and shipping format. The EFE variant specifically utilizes a thermally enhanced surface-mount package to facilitate heat dissipation. Understanding its position within the broader portfolio helps in identifying compatible evaluation boards and reference designs for rapid prototyping.

Replacement Considerations

LT3508IFE#TRPBF: Identical electrical specifications and functionality; differs only in tube packaging instead of tape-and-reel.