LT1374IS8-5SYNC#PBF

Overview

The LT1374IS8-5SYNC#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It integrates a 4.5A power switch and operates at a fixed 500kHz switching frequency. The device provides a fixed 5V output with a maximum continuous output current of 3.6A. It accepts an input voltage range from 5V to 25V. Key electrical characteristics include a typical quiescent supply current of 2.5mA and a shutdown current of 20µA. The component is housed in an 8-lead SOIC package and supports operation over an industrial temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-current 4.5A synchronous power switch for efficient step-down conversion.
• Features a constant 500kHz switching frequency to minimize external passive component size.
• Includes cycle-by-cycle current limiting and thermal protection for robust operation.

Applications

• Point-of-load regulation for digital signal processors and microprocessors.
• Power supplies for portable instrumentation and battery-operated devices.
• General-purpose 5V distribution systems requiring high efficiency.

Procurement Notes

Verify the specific suffix against official Analog Devices documentation, as standard datasheets typically list LT1374IS8-5#TRPBF or #PBF variants. Confirm that the SYNC designation corresponds to the intended pinout and functionality within the LT1374 family before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 5V output is required alongside high current capability. The integrated synchronous design offers superior efficiency compared to non-synchronous alternatives. Ensure the application environment remains within the specified -40°C to +125°C operating temperature range for reliable performance.

Part Context

This part belongs to the LT1374 series of high-efficiency step-down switching regulators. The series is characterized by its ability to deliver significant output current while maintaining a compact footprint through high-frequency operation. It serves as a core power management solution for applications demanding stable voltage regulation under varying load conditions.

Replacement Considerations

LT1374IS8-5#TRPBF

FAQ

What is the maximum output current capability?

The device provides a maximum output current of 3.6A.

Does the component support external synchronization?

Yes, the switching frequency can be synchronized to an external clock source.