LT1374CS8-5SYNC#PBF

Overview

The LT1374CS8-5SYNC#PBF is a monolithic buck switching regulator from Analog Devices, operating at a fixed 500 kHz frequency. It integrates a high-current switch capable of delivering up to 4.5 A, with a typical output current rating of 3.6 A. The device accepts an input voltage range of 5 V to 25 V and provides a fixed 5 V output. Key electrical parameters include a maximum quiescent current of 20 µA and a supply current of 2.5 mA. It supports operation in temperatures ranging from 0°C to +125°C and is housed in an SOIC-8 package.

Feature Summary

• Integrates a 4.5 A power switch for high-current step-down conversion
• Fixed 500 kHz switching frequency enables compact external component sizing
• Low quiescent current consumption enhances system efficiency
• Includes shutdown capability for power management

Applications

• Point-of-load regulation for digital signal processors
• Power supplies for embedded systems and industrial controllers
• Battery-powered equipment requiring efficient DC-DC conversion
• Telecommunications infrastructure power distribution

Procurement Notes

Verify the specific suffix SYNC against the manufacturer's official datasheet to confirm synchronous rectification implementation and pinout compatibility. Ensure the SOIC-8 package dimensions match your PCB footprint requirements. Cross-reference the part number with Analog Devices documentation to validate temperature ratings and electrical specifications before integration into production designs.

Selection Notes

Select this component when a fixed 5 V output is required from a 5 V to 25 V input rail. The integrated 4.5 A switch suits applications demanding moderate to high current without external pass transistors. The 500 kHz frequency balances efficiency and passive component size. Verify that the thermal performance of the SOIC-8 package meets the heat dissipation needs of the target application environment.

Part Context

This part belongs to the LT1374 family of monolithic buck regulators. The series is characterized by high efficiency and compact form factors suitable for space-constrained designs. The LT1374 line typically includes variants with adjustable or fixed outputs, differing primarily in internal feedback networks and output voltage settings while sharing core switching architecture.

Replacement Considerations

LT1374CS8-5#PBF is a documented variant within the same family, offering identical electrical performance but potentially differing in packaging or manufacturing lot specifications. Verify pin compatibility and thermal characteristics before substitution.