LD1086D2T12

Overview

The LD1086D2T12 is a positive fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 12 V output with a maximum continuous current of 1.5 A. The device operates within an input voltage range up to 30 V and maintains regulation with a typical dropout voltage of 1.3 V at full load, reducing to 1.2 V under lighter conditions. It features a quiescent current of 10 mA and includes internal protection against overcurrent and thermal overload. The unit is housed in a surface-mount TO-252-3 package and supports operation across a temperature range from -40 °C to +125 °C.

Feature Summary

• Delivers a fixed 12 V regulated output with high efficiency due to quiescent current flowing into the load rather than being wasted as heat.
• Incorporates on-chip trimming for tight output voltage tolerance of ±1% at 25 °C, ensuring precise power delivery.
• Provides comprehensive protection through integrated circuit limiting and thermal shutdown mechanisms to safeguard against fault conditions.

Applications

• Power supply sections for embedded systems requiring stable 12 V rails
• Battery-powered equipment utilizing low-dropout regulation for extended runtime
• General-purpose positive voltage regulation in industrial control modules

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer engagement. Confirm RoHS compliance status and specific packaging variants such as reel or cut tape availability. Review datasheet specifications for thermal management requirements and ensure compatibility with existing PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this regulator when a fixed 12 V output is required with up to 1.5 A capacity. Ensure the input voltage does not exceed 30 V and that the voltage differential allows for proper dropout performance. Consider the TO-252-3 package for surface-mount assembly needs. Verify that the application environment stays within the specified -40 °C to +125 °C operating temperature range for reliable long-term operation.

Part Context

This component belongs to the LD1086 series of low-dropout positive voltage regulators designed for high-current applications. The series offers both adjustable and fixed output options in various packages including TO-220, D²PAK, and DFN8. The LD1086D2T12 specifically utilizes the TO-252-3 form factor, providing pin-to-pin compatibility with older three-terminal adjustable regulators while delivering superior dropout characteristics and output accuracy.

Replacement Considerations

Direct pin-compatible alternatives within the same family include other fixed-voltage variants like LD1086D2T33TR or LD1086D2T25TR if different output voltages are needed. For adjustable versions, consider LD1086D2MTR. Cross-brand replacements require careful evaluation of pinout, thermal resistance, and electrical parameters to ensure functional equivalence without redesigning the host circuitry.