LD1086V12

Overview

The LD1086V12 is a positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed 12 V output with a maximum continuous current capability of 1.5 A. The device operates within an input voltage range up to 30 V and maintains stability with a minimum output capacitance of 10 µF. Key electrical specifications include a typical dropout voltage of 1.3 V at full load, line regulation of 25 mV, and load regulation of 36 mV. The unit offers high accuracy with a voltage tolerance of ±1% at 25 °C and functions reliably across an extended temperature range from -40 °C to +125 °C.

Feature Summary

• Fixed 12 V output voltage with ±1% tolerance for precise power supply applications
• Low dropout characteristic ensuring efficient operation under varying load conditions
• Integrated thermal overload and internal current limiting protection mechanisms

Applications

• General-purpose positive voltage regulation in electronic circuits
• Power management for embedded systems requiring stable 12 V rails
• Pre-regulation stages for switching power supplies

Procurement Notes

Verify the specific package variant (TO-220, D²PAK, DPAK, or DFN8) required for your design, as availability varies by form factor. Confirm RoHS compliance status and automotive qualification if applicable, noting that automotive-grade versions are limited to adjustable outputs in certain packages. Check for end-of-life notices or obsolescence warnings before finalizing procurement plans.

Selection Notes

Select this component when a fixed 12 V output is needed with high current capacity. Ensure the input voltage does not exceed the 30 V maximum rating. Verify that the application environment stays within the -40 °C to +125 °C operating range. Consider thermal dissipation requirements given the 1.5 A current capability and dropout voltage characteristics.

Part Context

The LD1086V series belongs to STMicroelectronics' family of 1.5 A low-dropout regulators. It serves as a pin-compatible alternative to older three-terminal adjustable regulators while offering superior performance in dropout voltage and output tolerance. The series includes both fixed and adjustable variants, designed for efficiency by directing quiescent current into the load rather than wasting it.

Replacement Considerations

The LD1086V12 is pin-compatible with standard adjustable voltage regulators, allowing for potential substitution in designs originally using generic three-terminal adjustable ICs, provided the fixed output requirement is met.