LT1374CR-SYNC#PBF

Overview

The LT1374CR-SYNC#PBF is a monolithic buck switching regulator from Analog Devices, featuring an integrated 4.5A power switch and a fixed 500kHz switching frequency. It operates with an input voltage range of 5V to 25V and delivers up to 3.6A output current in a DDPAK-7 package. The device includes cycle-by-cycle current limiting and a shutdown pin that reduces quiescent current to 20µA. Designed for high efficiency, it supports external synchronization to reduce electromagnetic interference.

Feature Summary

• Integrated 4.5A power switch for high-current step-down applications
• Fixed 500kHz switching frequency allows use of small surface-mount components
• External synchronization capability minimizes system noise
• Low shutdown current consumption for battery-powered systems

Applications

• Point-of-load regulation in portable handheld devices
• Board-level regulators in disk drives and personal computers
• General-purpose DC-to-DC step-down conversion
• High-frequency power supplies requiring low EMI

Procurement Notes

Verify the specific suffix against official datasheets to confirm internal circuitry variations. Ensure the DDPAK-7 package matches thermal requirements. Confirm RoHS compliance status through manufacturer documentation before integration.

Selection Notes

Select this component when a fixed 500kHz frequency and external sync are required. The DDPAK-7 package suits applications needing robust thermal performance. Verify input voltage limits do not exceed 25V during operation.

Part Context

Part of the LT1374 family of high-efficiency switching regulators. The SYNC suffix indicates support for clock synchronization. This model complements adjustable variants like the LT1374CR by providing a fixed-frequency solution optimized for noise-sensitive environments.

Replacement Considerations

LT1374CR#PBF serves as a non-synchronized alternative within the same package.