LT1374CS8-5#PBF

Overview

The LT1374CS8-5#PBF is a monolithic buck switching regulator from Analog Devices, housed in an SOIC-8 package. It operates with a fixed 500 kHz switching frequency and accepts input voltages between 5 V and 25 V to provide a regulated 5 V output. The device integrates a 4.5 A switch capable of delivering up to 3.6 A continuous output current. Key electrical characteristics include a low quiescent current of 20 µA in shutdown mode and a typical operating supply current of 2.5 mA. It functions within a temperature range of 0°C to +125°C.

Feature Summary

• Integrates a high-current 4.5 A power switch for efficient step-down conversion
• Features constant 500 kHz switching frequency to minimize external component size
• Includes cycle-by-cycle current limiting for robust protection
• Supports shutdown mode with ultra-low standby current consumption

Applications

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

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the CS8 variant corresponds to the commercial temperature range (0°C to +125°C) rather than industrial grades. Ensure the SOIC-8 footprint matches the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5 V output is required from a 5 V to 25 V input rail. It is suitable for designs prioritizing small inductor size due to the 500 kHz frequency. Consider the 3.6 A continuous output limit against peak load demands. The SOIC-8 package offers a compact solution compared to larger thermal packages like DPAK.

Part Context

This part belongs to the LT1374 family of high-efficiency buck converters. It shares core architecture with variants such as LT1374IR-5#PBF but differs in operating temperature range and physical package type. The series is designed for applications requiring high power density and minimal external component counts.

Replacement Considerations

LT1374HVIS8#PBF is listed as a parameter-equivalent substitute option.