LT3509HMSE#TRPBF

Overview

The LT3509HMSE#TRPBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. housed in a 16-lead MSOP package with an exposed pad. It operates from an input voltage range of 2.7V to 38V and delivers up to 1.5A output current. The device integrates a 1.5A power switch, features a fixed 2MHz switching frequency, and includes programmable soft-start and tracking capabilities. It offers high efficiency across wide load ranges and supports low quiescent current operation.

Feature Summary

• Integrates a high-efficiency synchronous buck converter with a 1.5A internal power switch
• Provides flexible startup sequencing through independent soft-start pin control
• Supports parallel operation for increased output current capability
• Includes comprehensive protection against over-current, thermal overload, and short circuits

Applications

• Point-of-load regulation in industrial equipment
• Power supply stages for embedded computing systems
• Battery-powered portable devices requiring efficient DC-DC conversion
• Telecommunications infrastructure power distribution

Procurement Notes

Verify the exact suffix TRPBF indicates tape-and-reel packaging configuration. Confirm the H grade denotes extended temperature range specifications compared to standard variants. Ensure the manufacturer source is Analog Devices Inc. or authorized distributors to guarantee component authenticity and traceability. Check RoHS compliance status if required for specific regulatory environments.

Selection Notes

Select this component when a compact solution is needed for inputs up to 38V with moderate current demands. The fixed 2MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the thermal performance of the MSOP package with exposed pad for heat dissipation requirements in dense PCB layouts.

Part Context

This part belongs to the LT3509 family of synchronous buck regulators designed for space-constrained applications. It complements other Analog Devices PMIC solutions by offering integrated power switching without external MOSFETs. The series targets applications requiring reliable, efficient voltage translation from higher bus voltages to lower logic levels.

Replacement Considerations

LT3509IMSE#TRPBF: Same functional specification with different temperature grade.