LD1084V18

Overview

The STMicroelectronics LD1084V18 is a positive low-dropout linear voltage regulator providing a fixed 1.8V output with a maximum current capability of 5A. It operates within an input voltage range up to 30V and features a typical dropout voltage of 1.3V at full load. The device ensures high precision with an output tolerance of ±1% at 25°C and ±2% across the full temperature range. It includes internal thermal limiting and short-circuit protection, functioning reliably in temperatures from -40°C to +125°C.

Feature Summary

• Provides a fixed 1.8V regulated output with guaranteed 5A current capacity
• Features tight output voltage tolerance of ±1% at 25°C for precise power delivery
• Includes integrated thermal overload and short-circuit current protection mechanisms

Applications

• Power supply stages for SCSI-2 active termination systems
• Voltage regulation for embedded logic circuits requiring stable 1.8V rails
• General-purpose DC-DC converter post-regulation for industrial equipment

Procurement Notes

Verify the specific package variant (TO-220, D2PAK, or D2PAK/A) required for your thermal and spatial constraints before ordering. Confirm that the fixed 1.8V output aligns with your system design, as this part number does not support adjustable configurations. Ensure compatibility with existing footprint layouts if replacing older three-terminal regulators.

Selection Notes

Select this component when a fixed 1.8V rail is necessary with high current demands up to 5A. It serves as a direct pin-compatible replacement for older adjustable regulators while offering superior dropout performance. Consider its efficiency benefits where quiescent current flows into the load rather than being wasted, optimizing overall system power consumption.

Part Context

This device belongs to the LD1084 series of low-dropout positive voltage regulators manufactured by STMicroelectronics. The series offers both adjustable and fixed output versions, designed to deliver up to 5A of output current. It is engineered to replace standard PNP-based regulators, providing improved line and load regulation characteristics alongside robust protection features.

Replacement Considerations

LD1084D2M18