LD1086D2T50

Overview

The LD1086D2T50 is a positive fixed low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 5 V with a maximum continuous output current capability of 1.5 A. The device operates within an input voltage range up to a maximum of 30 V and features a typical dropout voltage of 1.3 V at full load. It utilizes the D²PAK (TO-263) surface-mount package, ensuring compatibility with standard three-terminal adjustable regulators. The unit maintains an output voltage tolerance of ±1% at 25 °C and supports an extended operating temperature range from -40 °C to +125 °C.

Feature Summary

• Fixed 5 V output voltage with high precision regulation
• Capable of delivering up to 1.5 A output current
• Low dropout voltage characteristic for efficient power management
• Integrated thermal overload and short-circuit protection

Applications

• General-purpose power supply regulation in electronic circuits
• Battery-powered systems requiring stable voltage rails
• Embedded systems and microcontroller power distribution
• Industrial control equipment power conditioning

Procurement Notes

Verify the specific suffix 'D2T' against official datasheets to confirm the TO-263/D²PAK package variant. Ensure the part number corresponds to the fixed 5 V output configuration. Check manufacturing status as some LD1086 variants may be discontinued or subject to long lead times. Confirm RoHS compliance requirements for your specific application environment before finalizing procurement.

Selection Notes

Select this component when a stable 5 V rail is required for loads drawing up to 1.5 A. The D²PAK package offers superior thermal dissipation compared to smaller SMD packages, making it suitable for moderate power applications. Consider the input-to-output voltage differential to ensure the dropout voltage remains within acceptable limits under all load conditions. Verify that the PCB layout supports the thermal pad connection for optimal heat spreading.

Part Context

This component belongs to the LD1086 family of low-dropout positive voltage regulators. The family includes various fixed output voltages and adjustable versions across multiple packages such as TO-220, DPAK, and DFN8. The LD1086 series is designed to replace older PNP-based regulators, offering improved efficiency by directing quiescent current into the load rather than dissipating it internally.

Replacement Considerations

Direct pin-compatible replacements include other LD1086 variants with different output voltages if system design allows modification. Cross-reference with LD1086DT50TR for reel-packaged equivalents. Verify thermal performance characteristics against alternative LDOs if higher current density is required.