LT1374CR-5#TRPBF

Overview

The LT1374CR-5#TRPBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It integrates a 4.5A switch and operates at a constant 500kHz frequency. The device accepts an input voltage range of 5V to 25V and provides a fixed 5V output with a maximum current of 3.6A. Key electrical parameters include a typical supply current of 2.5mA and a shutdown current of 20µA. It utilizes current-mode control for fast transient response and includes cycle-by-cycle current limiting. The component is housed in a DPAK-7 surface-mount package.

Feature Summary

• Integrates a high-current 4.5A power switch within the monolithic die
• Operates at a fixed 500kHz switching frequency to minimize external component size
• Features current-mode control architecture for rapid transient response
• Includes built-in cycle-by-cycle current limiting protection

Applications

• Point-of-load regulation for embedded systems
• Battery-powered equipment requiring efficient step-down conversion
• Industrial control systems utilizing 5V logic rails
• Telecommunications infrastructure power distribution

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm the -5 variant corresponds to the fixed 5V output specification rather than adjustable versions. Ensure compatibility with the DPAK-7 thermal requirements for your PCB layout. Cross-reference the manufacturer part number directly with Analog Devices documentation to avoid counterfeit components.

Selection Notes

Select this component when a fixed 5V output is required from a 5V to 25V input source. It is suitable for applications needing up to 3.6A continuous load current. Consider the DPAK-7 package for adequate thermal dissipation without excessive board space. Evaluate the 500kHz frequency against EMI constraints and inductor size requirements compared to lower-frequency alternatives.

Part Context

This part belongs to the LT1374 family of high-efficiency step-down switching regulators. The series is designed for applications demanding high power density and low standby current. The LT1374 line typically offers both adjustable and fixed output voltage options across various packages, providing flexibility for diverse power management designs in industrial and commercial sectors.

Replacement Considerations

LT1374CR#PBF: Adjustable output version in similar DPAK-7 package.