LT1374CS8#PBF

Overview

The LT1374CS8#PBF is a monolithic buck switching regulator from Analog Devices, housed in an 8-pin SOIC package. It operates with a fixed 500 kHz switching frequency and accepts input voltages between 5 V and 25 V. The device delivers up to 4.5 A of switch current, providing regulated outputs such as 5 V at 3.6 A. Key electrical characteristics include a low static current of 20 uA and a shutdown feature. It functions within a temperature range of 0°C to +125°C TJ.

Feature Summary

• Integrates a high-efficiency power switch with a constant-frequency current-mode controller for stable regulation.
• Features a compact 8-lead SOIC package designed to minimize footprint while supporting surface-mount assembly.
• Includes a dedicated shutdown pin to significantly reduce quiescent current during standby modes.

Applications

• Local on-board voltage regulation in personal computer systems
• Power supply stages for disk drive mechanisms
• Voltage conversion for portable hand-held devices

Procurement Notes

Verify the specific suffix against official datasheets to confirm pinout compatibility and thermal ratings. Confirm RoHS compliance status through manufacturer declarations. Ensure the SOIC-8 package dimensions match your PCB footprint requirements. Check for any recent product change notices that may affect lead times or material composition.

Selection Notes

Select this component when a fixed 500 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. The 4.5 A switch current capability supports moderate load requirements without external passives. Consider the 8-pin constraint if board space is limited, noting that higher current variants may require different packaging.

Part Context

This part belongs to the LT1374 family of step-down regulators known for integrating high-current switches in small packages. It serves as a core power management solution for systems requiring efficient DC-DC conversion from standard bus voltages like 12 V or 15 V down to logic levels.

Replacement Considerations

LT1374HVCS8#PBF is listed as a parameter-equivalent substitute offering extended input voltage capabilities.