LT3481IMSE#TRPBF

Overview

The LT3481IMSE#TRPBF 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 output current. The device features a fixed 2.8MHz switching frequency, enabling the use of small external components. It provides an adjustable output voltage from 1.265V to 20V. Key electrical parameters include a quiescent current of 50µA, a shutdown supply current of 1µA, and operation over a temperature range of -40°C to +125°C. The component utilizes a 10-pin DFN package.

Feature Summary

• Integrates a 2.8MHz fixed-frequency synchronous buck converter for compact design
• Features low quiescent current of 50µA and deep sleep mode with 1µA shutdown current
• Supports wide 3.6V to 36V input voltage range for versatile power applications
• Includes internal soft-start and cycle-by-cycle current limit protection

Applications

• Battery-powered portable equipment requiring high efficiency
• Industrial control systems with wide input voltage variations
• Automotive electronics operating within specified voltage limits
• Embedded systems needing regulated power from unregulated sources

Procurement Notes

Verify the specific suffix configuration against official Analog Devices documentation to ensure correct packaging and temperature grade. Confirm that the requested part matches the exact pinout and thermal pad requirements for your PCB layout. Cross-reference the datasheet revision history for any recent updates to electrical characteristics or recommended external component values prior to finalizing procurement orders.

Selection Notes

Select this regulator when a fixed high switching frequency is preferred to minimize passive component size compared to adjustable frequency variants. Consider the 50µA quiescent current for battery life optimization in standby modes. Ensure the application does not exceed the 2A continuous output current rating under all thermal conditions. Verify compatibility with the required output voltage range of 1.265V to 20V.

Part Context

This component belongs to the LT3481 series of micropower synchronous step-down regulators. It shares architectural similarities with the LT3480 but differs in switching frequency and specific feature sets. The IMSE designation indicates the industrial temperature grade and MSOP/DFN package type. It serves as a solution for space-constrained designs requiring efficient DC-DC conversion from higher voltage rails.

Replacement Considerations

• LT3481HDD#TRPBF