LT1374CS8-SYNC#PBF

Overview

The LT1374CS8-SYNC#PBF is a monolithic synchronous buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 5 V to 25 V and delivers up to 4.5 A of output current. The device features a fixed 5 V output and integrates internal high-side and low-side power switches for improved efficiency. It functions at a switching frequency of 500 kHz, supports shutdown mode, and includes thermal protection. The component is housed in an 8-lead SOIC package and is rated for operation between 0°C and +125°C.

Feature Summary

• Integrated synchronous rectification utilizing internal N-channel MOSFETs
• Fixed 5 V output configuration for simplified design
• Built-in thermal shutdown and current limit protection

Applications

• Point-of-load regulation for digital signal processors
• Power supply stages for embedded microcontroller systems
• Battery-powered equipment requiring efficient step-down conversion

Procurement Notes

Verify the exact part number against official Analog Devices documentation to confirm the SYNC suffix indicates integrated synchronous rectification. Ensure the SOIC-8 package matches your PCB footprint requirements. Confirm that the fixed 5 V output aligns with your system voltage needs, as adjustable variants exist within the same family.

Selection Notes

Select this component when a fixed 5 V output is required alongside high efficiency and compact size. The synchronous design reduces external component count compared to non-synchronous alternatives. Consider the 500 kHz switching frequency for balancing EMI and passive component size. Verify thermal performance under maximum load conditions given the SOIC-8 package constraints.

Part Context

This part belongs to the LT1374 series of high-current switching regulators. It shares the core architecture with the standard LT1374 but incorporates internal synchronous switches. This distinguishes it from the LT1374C (non-synchronous) and LT1374HV (high-voltage input) variants. The series is designed for applications demanding robust performance in space-constrained environments.

Replacement Considerations

LT1374CS8#PBF (Non-synchronous version)

FAQ

What does the SYNC suffix indicate?

The SYNC suffix denotes that the device contains integrated synchronous rectification switches, eliminating the need for external Schottky diodes.

Is the output voltage adjustable?

No, the LT1374CS8-SYNC#PBF has a fixed 5 V output. Adjustable versions are available in the LT1374 family.