LT1374CR-SYNC#TRPBF

Overview

The LT1374CR-SYNC#TRPBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates at a fixed 500 kHz switching frequency and integrates a 4.5 A power switch. The device accepts an input voltage range of 5 V to 25 V and provides an adjustable output voltage. Key electrical parameters include a maximum output current of 3.6 A, a quiescent current of 20 µA in shutdown mode, and a supply current of 2.5 mA during operation. It supports cycle-by-cycle current limiting and external synchronization. The component is housed in a surface-mount DDPAK-7 package and is rated for an operating temperature range from 0 °C to +125 °C.

Feature Summary

• Integrates a high-current 4.5 A internal switch with all necessary oscillator and control logic for a compact solution.
• Features a fixed 500 kHz switching frequency that enables the use of small surface-mount components and reduces inductor size.
• Includes an external synchronization pin allowing the internal oscillator to lock to an external clock signal.
• Provides low standby power consumption with a dedicated shutdown function reducing supply current to 20 µA.

Applications

• Point-of-load regulation for embedded systems requiring efficient step-down conversion.
• Battery-powered equipment utilizing the low quiescent current and shutdown capabilities.
• Industrial control systems operating within standard 5 V to 25 V input ranges.
• Communication infrastructure powering digital logic circuits from higher bus voltages.

Procurement Notes

Verify the specific suffix against official documentation to confirm the synchronous rectifier configuration and tape-and-reel packaging format. Ensure the ordering part number matches the required thermal performance and pinout specifications for the target application design.

Selection Notes

Select this component when a fixed 500 kHz frequency and external synchronization are required for noise management. Choose this part over non-synchronous variants if higher efficiency at moderate loads is needed. Verify that the DDPAK-7 package thermal characteristics meet the system's heat dissipation requirements for the expected load current.

Part Context

This part belongs to the LT1374 family of high-efficiency step-down switching regulators. The series is designed to replace linear regulators in applications where efficiency and thermal management are critical. The SYNC variant specifically adds synchronization capability to the standard buck regulator architecture.

Replacement Considerations

LT1374CR#PBF

FAQ

Does the LT1374CR-SYNC#TRPBF support external clock synchronization?

Yes, the device includes a SYNC pin that allows the internal 500 kHz oscillator to be synchronized to an external clock source.

What is the maximum input voltage for this regulator?

The maximum input voltage rating for the LT1374CR-SYNC#TRPBF is 25 V.