LT1374CS8-SYNC#TRPBF

Overview

The LT1374CS8-SYNC#TRPBF is a synchronous buck switching regulator IC from Analog Devices. It operates with an input voltage range of 5V to 25V and provides a single adjustable output starting at 2.42V. The device integrates a high-current switch capable of delivering up to 4.5A, supporting a fixed switching frequency of 500kHz. It utilizes an 8-lead SOIC package (3.90mm width) and functions within a junction temperature range of 0°C to 125°C.

Feature Summary

• Integrates a synchronous rectifier architecture for improved efficiency compared to standard asynchronous designs.
• Features a compact monolithic design combining the power switch and control logic in a small surface-mount package.
• Supports both buck and SEPIC topologies for flexible input-output voltage configurations.

Applications

• Local on-board voltage regulation in personal computers
• Power management for disk drive systems
• Voltage conversion in portable hand-held devices

Procurement Notes

Verify the specific suffix '#TRPBF' indicates tape-and-reel packaging when ordering. Confirm that the 'SYNC' designation denotes the integrated synchronous rectifier variant, distinct from non-synchronous versions. Ensure compatibility with the required 8-SOIC footprint during PCB layout. Cross-reference the manufacturer's latest datasheet for any updates regarding RoHS compliance or environmental declarations prior to final procurement.

Selection Notes

Select this component when a synchronous solution is required to minimize external component count and improve thermal performance. The 500kHz frequency allows for smaller passive components compared to lower-frequency regulators. Consider the 4.5A switch current limit against peak load requirements. The adjustable output range accommodates various logic families. Verify that the 25V maximum input voltage aligns with the system supply rails.

Part Context

This part belongs to the LT1374 family of high-efficiency switching regulators. It serves as a successor to earlier asynchronous models by integrating the low-side MOSFET. The family is known for robust performance in space-constrained applications. The CS8 package variant offers a balance between thermal dissipation and board area efficiency for industrial and consumer electronics.

Replacement Considerations

LT1374HVIS8#PBF is listed as a parameter-equivalent substitute. Verify pinout and electrical specifications match before substitution. Non-synchronous variants like LT1374CS8#TRPBF lack the integrated sync rectifier and require external diodes.