LT3481IMSE#PBF

Overview

The LT3481IMSE#PBF is a micropower step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6V to 36V and delivers up to 2A of output current. The device features a fixed 2.8MHz switching frequency and maintains a typical quiescent current of 50µA. It utilizes a 10-lead MSOP package with an exposed thermal pad for efficient heat dissipation.

Feature Summary

• Integrates high-efficiency synchronous rectification within a compact footprint
• Provides constant-frequency operation at a fixed 2.8MHz switching rate
• Features low quiescent current consumption for enhanced battery life
• Includes internal compensation to simplify external component requirements

Applications

• Portable instrumentation systems requiring efficient power conversion
• Battery-powered equipment needing extended operational duration
• Industrial control modules utilizing wide input voltage ranges
• Embedded communication infrastructure power supplies

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm pinout compatibility and thermal performance characteristics. Ensure that the procurement channel provides valid traceability records for quality assurance purposes. Cross-reference the package outline dimensions with your PCB layout specifications prior to finalizing orders to prevent mechanical integration issues during assembly.

Selection Notes

Select this component when designing systems that require a wide input voltage range combined with moderate output current capabilities. The fixed 2.8MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal requirements of the MSOP package and ensure adequate copper area is allocated on the PCB for optimal heat spreading under maximum load conditions.

Part Context

This part belongs to the LT3480/LT3481 family of micropower switching regulators designed for space-constrained applications. These devices integrate power switches and control logic into a single monolithic IC. The family offers various switching frequencies and quiescent current options to balance efficiency, size, and cost across diverse portable and industrial electronic designs.

Replacement Considerations

LT3480IMSE#PBF: Similar topology but operates at a different switching frequency. LT3681IMSE#PBF: Higher current capability with integrated Schottky diode. Verify electrical parameters and pin configurations before substitution.