LT1374CT7-5#PBF

Overview

The LT1374CT7-5#PBF 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 provides a fixed 5V output with an input voltage range of 5V to 25V. It features a TO-220-7 package for through-hole mounting. Key electrical parameters include a 2.5mA operating supply current, 20µA shutdown current, and cycle-by-cycle current limiting. The unit supports operation from 0°C to +125°C junction temperature.

Feature Summary

• Integrates a high-current 4.5A power switch within the monolithic die
• Maintains a constant 500kHz switching frequency for reduced inductor size
• Includes built-in cycle-by-cycle current limiting protection
• Supports external synchronization capability

Applications

• Point-of-load regulation for digital logic circuits
• Battery-powered systems requiring efficient step-down conversion
• Industrial control boards utilizing 5V distribution networks

Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm pinout compatibility and thermal characteristics. Ensure the selected variant matches the required output voltage tolerance and package lead configuration for the target PCB footprint. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability records prior to acquisition.

Selection Notes

Select this component when a robust through-hole solution is required for high-current applications. The TO-220-7 package facilitates effective heat dissipation without additional heatsinking in moderate load scenarios. Consider the fixed 5V output constraint; if adjustable voltage is needed, choose the CT7 variant instead. Evaluate the 500kHz frequency against EMI constraints and passive component availability for the specific design environment.

Part Context

This part belongs to the LT1374 family of high-efficiency step-down regulators. Unlike surface-mount variants such as the IR or HV series, the CT7 utilizes a through-hole TO-220-7 package designed for higher thermal performance and mechanical stability. The family shares core architecture including the 4.5A switch and 500kHz oscillator, but differs in packaging and maximum input voltage ratings depending on the specific suffix.

Replacement Considerations

LT1374CT7#PBF serves as the adjustable voltage equivalent within the same package.