LT1374IS8-SYNC#PBF

Overview

The LT1374IS8-SYNC#PBF is a monolithic Buck switching regulator manufactured by Analog Devices Inc. It operates with a fixed 500 kHz switching frequency and supports an input voltage range of 5 V to 25 V. The device provides a fixed 5 V output with a maximum switch current of 4.5 A and a continuous output current of 3.6 A. It features a low quiescent current of 20 uA and includes a shutdown function. The component is housed in an 8-lead SOIC package and is rated for operation between -40°C and +125°C.

Feature Summary

• Integrated synchronous rectification architecture for improved efficiency
• Fixed 500 kHz switching frequency enables compact external component sizing
• Low quiescent current consumption reduces standby power loss
• Built-in shutdown control allows for system power management

Applications

• Point-of-load regulation for embedded systems
• Power supply stages for industrial control equipment
• Voltage conversion for communication infrastructure modules

Procurement Notes

Verify the specific suffix 'SYNC' indicates integrated synchronous rectification, distinguishing it from standard asynchronous variants like the LT1374IS8#PBF. Confirm the package type matches the design requirements. Check for RoHS compliance status as indicated in official documentation. Ensure the operating temperature range aligns with the application environment specifications.

Selection Notes

Select this variant when higher efficiency is required compared to asynchronous buck regulators due to the internal synchronous rectifier. The fixed 5 V output simplifies design for standard logic levels. Consider the thermal performance of the SOIC package under full load conditions. Verify that the 500 kHz frequency suits the electromagnetic interference constraints of the target system.

Part Context

This component belongs to the LT1374 series of high-efficiency switching regulators. It shares the core topology and pinout with other LT1374 variants but integrates synchronous rectifiers internally. This integration differentiates it from the standard LT1374IS8#PBF, which uses an external diode for the low-side switch.

Replacement Considerations

• LT1374IS8#PBF (Asynchronous version; requires external diode)

FAQ

What distinguishes the LT1374IS8-SYNC#PBF from the LT1374IS8#PBF?

The LT1374IS8-SYNC#PBF integrates synchronous rectification internally, whereas the LT1374IS8#PBF is an asynchronous regulator requiring an external Schottky diode.

Is the output voltage adjustable on this part?

No, the LT1374IS8-SYNC#PBF has a fixed 5 V output. Adjustable versions are available with different suffixes, such as LT1374IS8#PBF.