LT1374HVIR#PBF

Overview

The LT1374HVIR#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 from 5V to 32V. The device provides an adjustable output voltage up to 27.52V with a maximum switch current of 4.5A and a continuous output current of 3.6A. It utilizes current-mode control for rapid transient response and includes features such as soft-start and thermal shutdown. The component is housed in a DDPAK-7 surface-mount package and is rated for operation between -40°C and +125°C.

Feature Summary

• Integrates a high-voltage power switch capable of delivering 4.5A peak current within a compact footprint.
• Employs current-mode control architecture to ensure stable operation and fast load transient response.
• Includes built-in protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Applications

• Industrial point-of-load regulation
• Distributed power systems
• Battery-powered equipment

Procurement Notes

Verify the specific suffix against official documentation, as ordering codes may indicate variations in packaging or compliance status. Confirm availability through authorized channels, noting that this part number may be subject to discontinuation or limited supply constraints. Ensure compatibility with existing design specifications before procurement.

Selection Notes

Select this regulator when a high-efficiency step-down solution is required for inputs up to 32V. The fixed 500kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the thermal performance of the DDPAK-7 package for heat dissipation requirements in the target application environment.

Part Context

This component belongs to the LT1374 family of switching regulators designed for high-power density applications. The HV variant specifically supports higher input voltages than standard versions. It serves as a power management integrated circuit (PMIC) suitable for converting higher bus voltages to lower logic or analog supply rails efficiently.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.