LD1085DT18R

Overview

The LD1085DT18R is a positive fixed linear voltage regulator manufactured by STMicroelectronics, delivering a fixed output of 1.8V at up to 3A output current. It features a maximum input voltage of 30V and a dropout voltage of 1.5V at full load. The device includes internal overcurrent and thermal overload protection and operates within a temperature range of -40°C to 125°C. It utilizes a DPAK surface-mount package.

Feature Summary

• Provides stable regulated output with integrated overcurrent and thermal protection mechanisms for system reliability.
• Designed for high efficiency as quiescent current flows into the load rather than being wasted.
• Requires minimal external capacitance for stability, simplifying circuit design.

Applications

• SCSI-2 active termination circuits
• General-purpose low-dropout power supply regulation
• Embedded systems requiring stable 1.8V logic rails

Procurement Notes

Verify component authenticity through authorized channels due to discontinued status. Confirm RoHS compliance requirements as specific revision data may vary. Ensure proper handling procedures are followed during installation to maintain performance integrity in final assemblies.

Selection Notes

Select this component when a fixed 1.8V output is required with high current capability. Consider the DPAK package for thermal management needs. Evaluate alternative packages if pin compatibility with older regulators is necessary for existing board layouts.

Part Context

This part belongs to the LD1085 series of low-dropout positive voltage regulators. The series offers adjustable and fixed output versions capable of providing up to 3A of output current. It is designed to be pin-to-pin compatible with older three-terminal adjustable regulators while offering improved performance characteristics.

Replacement Considerations

LD1085DT18T is a verified substitute within the same series offering identical electrical specifications and functionality.