LD1084V12

Overview

The LD1084V12 is a low-drop positive voltage regulator manufactured by STMicroelectronics, designed to provide a fixed output of 12 V with a maximum current capability of 5 A. It operates within an input voltage range up to 30 V and maintains performance across a wide temperature range from -40 °C to +125 °C. The device features a typical dropout voltage of 1.3 V at full load, guaranteed not to exceed 1.5 V. Output tolerance is specified at ±1% at 25 °C and ±2% over the full temperature range. Quiescent current is typically 10 mA, and it includes internal power and thermal limiting protections.

Feature Summary

• Provides a fixed 12 V output with high efficiency as quiescent current flows into the load rather than being wasted.
• Features pin-to-pin compatibility with standard adjustable regulators while offering improved dropout and output tolerance.
• Includes internal protection mechanisms against excessive power dissipation and junction temperature.
• Requires only a minimum 10 µF capacitor for stability.

Applications

• General-purpose linear power supply regulation
• Pre-regulator stages for switching converters
• Power distribution in embedded systems

Procurement Notes

Verify the specific package configuration and ordering code prior to procurement. Confirm that the application environment remains within the specified operating temperature limits and does not exceed the absolute maximum ratings for input voltage or power dissipation. Ensure adequate heat sinking is implemented to manage thermal resistance given the TO-220 package constraints.

Selection Notes

Select this component when a fixed 12 V rail is required with up to 5 A load capacity. It is suitable for applications needing better dropout performance than older PNP-based regulators. Consider the thermal management requirements carefully, as power dissipation increases significantly with higher input-output differentials at full load currents.

Part Context

This part belongs to the LD1084xx family of 5 A low-dropout positive voltage regulators. The family includes adjustable versions and other fixed output variants such as 2.5 V, 5 V, and 2.85 V. The LD1084V12 specifically provides the 12 V fixed option within this series, sharing common electrical characteristics and protection features with its siblings.

Replacement Considerations

LD1084XX12