LT1374IS8-5#PBF

Overview

The LT1374IS8-5#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates at a constant 500kHz frequency and delivers up to 4.5A of switch current. The device accepts an input voltage range from 5V to 25V and provides a fixed 5V output. It features a low operating supply current of 2.5mA and a shutdown current of 20µA. Packaged in an SOIC-8 surface-mount case, it supports operation temperatures from -40°C to +125°C.

Feature Summary

• Integrates a high-power 4.5A synchronous switch with control logic for compact design
• Maintains constant 500kHz switching frequency to minimize external component size
• Includes cycle-by-cycle current limiting for robust protection

Applications

• Point-of-load regulation for digital signal processors
• Battery-powered systems requiring efficient step-down conversion
• General-purpose 5V distribution networks

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required fixed output voltage and package type for your circuit design. Cross-reference datasheet revisions to validate performance parameters before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5V output is required from a 5V to 25V input source. The integrated 4.5A switch capability supports high-current loads without external pass transistors. Consider the SOIC-8 package constraints for thermal management in dense PCB layouts. Verify that the 500kHz frequency aligns with electromagnetic interference requirements.

Part Context

This part belongs to the LT1374 family of high-efficiency step-down switching regulators. The series is characterized by its ability to drive heavy loads while maintaining high efficiency across a wide input voltage range. The IS8-5 variant specifically denotes the industrial temperature grade and fixed 5V output configuration within the broader product line.

Replacement Considerations

LT1374CS8-5#PBF serves as a commercial grade alternative with identical electrical specifications but a restricted operating temperature range.