LT1374CR#PBF

Overview

The LT1374CR#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates with a constant 500kHz switching frequency and supports an input voltage range of 5V to 25V. The device integrates a 4.5A power switch and delivers up to 3.6A output current. It features adjustable output voltage, 20µA shutdown current, and 2.5mA operating supply current. The component is housed in a DDPAK-7 surface-mount package and functions within a temperature range of 0°C to +125°C.

Feature Summary

• Integrates a high-power 4.5A switch for efficient step-down conversion
• Utilizes a constant 500kHz switching frequency to minimize external component size
• Includes cycle-by-cycle current limiting for robust protection
• Supports easy synchronization to an external clock signal

Applications

• On-board regulation for larger systems
• Power supplies for disk drives
• Portable handheld equipment
• Personal computer power architectures

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the DDPAK-7 package variant matches the target PCB footprint. Ensure the 5V to 25V input range aligns with the system design requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring high efficiency in a compact form factor. The 500kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify thermal management capabilities are sufficient for the expected load current within the specified operating temperature range.

Part Context

This part belongs to the LT1374 series of 4.5A step-down switching regulators. It is designed to provide a complete DC-to-DC solution using all surface-mount components. The series emphasizes reduced inductor size and high power density for space-constrained applications.

Replacement Considerations

LT1374CR-5#PBF provides a fixed 5V output version of the same regulator family.