LT1374IS8#PBF

Overview

The LT1374IS8#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc. It operates with a constant 500kHz switching frequency and supports an input voltage range from 5V to 25V. The device provides a single adjustable output, capable of delivering up to 4.5A of switch current. It utilizes current-mode control for rapid transient response and incorporates a saturating inductor design to minimize external component size. The IC is housed in an 8-lead SOIC package and is rated for operation over a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency power switch and controller for compact surface-mount solutions
• Utilizes current-mode control architecture for improved line and load regulation
• Features a fixed 500kHz switching frequency to allow the use of small passive components
• Includes internal compensation and protection mechanisms for stable operation

Applications

• Local on-board voltage regulation in personal computers
• Power supply stages for disk drives
• Voltage conversion for portable hand-held devices
• Point-of-load regulation in larger industrial systems

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required operating temperature range and packaging style for your PCB layout. Cross-reference the datasheet revision history to validate any recent design changes or material declarations before finalizing procurement specifications.

Selection Notes

Select this component when a high-current buck converter is needed within a limited board area. The 500kHz frequency enables smaller inductors compared to lower-frequency alternatives. Verify that the input voltage does not exceed the maximum rating and that the thermal performance of the SOIC package meets the application's heat dissipation requirements under full load conditions.

Part Context

This part belongs to the LT1374 family of high-efficiency switching regulators. The series is designed to replace linear regulators in applications requiring higher efficiency and lower heat generation. The IS8 designation indicates the industrial temperature grade and SOIC-8 package configuration, distinguishing it from other variants like the CR (TO-263) or HV (High Voltage) versions.

Replacement Considerations

LT1374HVIS8#PBF is documented as a parameter-equivalent substitute offering extended input voltage capabilities.