LT1374CR-5SYNC#PBF

Overview

The LT1374CR-5SYNC#PBF is a monolithic buck switching regulator from Analog Devices, operating at a constant 500kHz frequency. It integrates a 4.5A power switch and supports an input voltage range of 5V to 25V. The device provides a fixed 5V output with a maximum current capability of 4.5A. Key electrical parameters include a quiescent supply current of 2.5mA and a shutdown current of 20µA. It features cycle-by-cycle current limiting and is housed in a surface-mount DDPAK-7 package.

Feature Summary

• Integrates a high-efficiency 4.5A synchronous power switch for compact design
• Operates at a constant 500kHz switching frequency to minimize external component size
• Includes built-in cycle-by-cycle current limiting for robust protection
• Supports low-power standby modes with dedicated shutdown functionality

Applications

• On-board voltage regulation for portable handheld devices
• Power supplies for disk drives and personal computer subsystems
• Step-down conversion for larger systems requiring localized regulation

Procurement Notes

Verify the specific suffix SYNC indicates synchronization capabilities or evaluation board compatibility as per official documentation. Confirm the package type matches the required PCB footprint. Ensure compliance with RoHS directives if applicable to the target market. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and availability status before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5V output is required from a 5V to 25V input rail. The 500kHz frequency allows for smaller inductors compared to lower-frequency regulators. Consider the thermal performance of the DDPAK-7 package for the expected load current. Verify that the application does not require adjustable output voltages, as this variant is fixed at 5V.

Part Context

This part belongs to the LT1374 family of high-current step-down regulators. The series is designed for applications demanding high efficiency and small solution size. The CR suffix typically denotes commercial temperature range operation, while the SYNC suffix may relate to synchronization features or specific evaluation configurations.

Replacement Considerations

LT1374CR#PBF (Adjustable Output Variant)

FAQ

What is the maximum input voltage for the LT1374CR-5SYNC#PBF?

The maximum input voltage is 25V.

Does the LT1374CR-5SYNC#PBF support external clock synchronization?

Yes, the device is easily synchronizable to an external clock source.