LT1374CT7#PBF

Overview

The LT1374CT7#PBF is a monolithic buck mode switching regulator manufactured by Analog Devices Inc. It integrates a 4.5A switch with oscillator, control, and logic circuitry in a TO-220-7 package. The device operates at a constant 500kHz switching frequency, enabling the use of small surface-mount components and reducing inductor size to 1.8µH. It features an effective supply current of 2.5mA and a shutdown current of 20µA. Input voltage ranges from 5V to 25V, supporting adjustable output voltages between 2.42V and 21.5V. It includes cycle-by-cycle current limiting and is easily synchronizable.

Feature Summary

• Integrates a high-power 4.5A switch within a monolithic buck mode architecture
• Operates at a constant 500kHz switching frequency for reduced component size
• Features low power consumption with 2.5mA supply current and 20µA shutdown current
• Includes cycle-by-cycle current limiting and synchronization capability

Applications

• Battery-powered systems requiring efficient step-down conversion
• Post-regulation for bus distribution networks
• High-efficiency point-of-load applications

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the TO-220-7 through-hole package matches your PCB footprint requirements. Ensure input voltage does not exceed 25V maximum ratings. Check for availability constraints as distribution status may vary. Validate thermal management needs given the 4.5A switch current capacity.

Selection Notes

Select this component for designs requiring a robust 4.5A synchronous-free buck solution in a through-hole package. The fixed 500kHz frequency simplifies filter design compared to variable frequency regulators. Consider the TO-220-7 form factor if surface-mount space is limited but thermal dissipation is critical. Verify that the 5V minimum input voltage aligns with your source rails.

Part Context

This part belongs to the LT1374 series of high-current switching regulators. It is distinct from the LT1373, which supports multiple topologies including boost and SEPIC. Unlike the LT1074, which handles higher input voltages up to 64V, the LT1374 is optimized for 5V to 25V inputs. The CT7 suffix specifically denotes the TO-220-7 plastic package variant.

Replacement Considerations

LT1374CR#PBF offers the same electrical specifications in a DDPAK-7 surface-mount package.