LD1084D2M50R

Overview

The LD1084D2M50R is a fixed-output low-dropout positive voltage regulator manufactured by STMicroelectronics. It provides a nominal output voltage of 5V with a guaranteed maximum output current of 5A. The device operates within an input voltage range up to 30V and maintains performance across a wide operating temperature range from -40°C to +125°C. Dropout voltage is typically 1.3V at full load, decreasing under lighter loads. The component utilizes a D2PAK surface-mount package.

Feature Summary

• Provides stable regulation for high-current applications with typical dropout voltage of 1.3V at 5A
• Includes internal protection mechanisms against thermal overload and short-circuit conditions
• Features tight output voltage tolerance of ±1% at 25°C and ±2% across the full temperature range
• Quiescent current flows into the load rather than being wasted, improving overall system efficiency

Applications

• General-purpose power supply circuits requiring regulated 5V rails
• Battery-powered systems needing efficient linear regulation
• Embedded electronics and industrial control modules
• Communication equipment and computer peripheral power distribution

Procurement Notes

Verify the specific ordering suffix 'R' corresponds to tape-and-reel packaging as indicated in standard nomenclature, though official datasheet tables do not explicitly define this suffix. Confirm availability status directly with the manufacturer or authorized distributors, as lead times and stock levels are subject to change. Ensure the procurement documentation matches the exact part number LD1084D2M50R to avoid confusion with other voltage variants or package types within the LD1084 series.

Selection Notes

Select this component when a fixed 5V output is required with high current capability up to 5A. Consider the D2PAK package for surface-mount assembly where thermal dissipation is managed via the exposed pad. Evaluate the input-to-output voltage differential to ensure it remains within the specified dropout limits under maximum load conditions. Verify that the application environment stays within the -40°C to +125°C operating temperature range for optimal performance.

Part Context

This device belongs to the LD1084 series of 5A low-dropout positive voltage regulators produced by STMicroelectronics. The series includes both adjustable and fixed-output versions available in various packages such as TO-220, D2PAK, and D2PAK/A. The LD1084 is designed as a pin-compatible replacement for older three-terminal adjustable regulators but offers superior dropout performance and tighter output voltage tolerances.

Replacement Considerations

LD1084D2M50

FAQ

What is the minimum capacitor requirement for stability?

Only a minimum 10µF capacitor is needed for stability.

How does the quiescent current behavior differ from PNP regulators?

Unlike PNP regulators where quiescent current is wasted, the LD1084 quiescent current flows into the load, increasing efficiency.