LD1086D2T33

Overview

The LD1086D2T33 is a fixed-output low-dropout linear regulator from the STMicroelectronics LD1086 series. It provides a stable 3.3 V output with a maximum continuous current of 1.5 A. The device supports an input voltage range up to 30 V and operates within a temperature range of -40°C to +125°C. Key electrical parameters include a line regulation of 6 mV, load regulation of 10 mV, and a voltage accuracy of ±1%. It features a dropout voltage of 1.5 V at full load and a typical quiescent current of 5 mA. The component is housed in a surface-mount D2PAK (TO-263-3) package.

Feature Summary

• Provides high-current regulation capability with a 1.5 A output capacity for demanding power loads.
• Maintains precise output voltage stability through tight line and load regulation specifications.
• Operates reliably across extended industrial temperature ranges suitable for harsh environments.
• Integrates internal protection mechanisms against overcurrent conditions and excessive thermal stress.

Applications

• Power supply stages for industrial automation controllers and programmable logic modules
• Voltage regulation for automotive electronic control units and onboard sensors
• Biasing circuits for communication equipment and network interface hardware
• Power management for medical instrumentation and precision measurement devices

Procurement Notes

Verify the specific suffix code on the component marking to confirm the exact package variant and tape-and-reel configuration. Ensure the ordering part number matches the required lead frame finish and moisture sensitivity level. Cross-reference the manufacturer datasheet revision history to confirm compliance with current environmental directives and material declarations before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.3 V rail is required with significant current handling above standard LDO limits. The wide input voltage tolerance allows use in systems with varying supply rails. Consider the thermal dissipation requirements of the D2PAK package for high ambient temperatures or sustained full-load operation compared to smaller surface-mount alternatives.

Part Context

This device belongs to the LD1086 family of positive low-dropout regulators designed for general-purpose power management. The series offers various fixed output voltages and packaging options to suit different board space and thermal constraints. It serves as a robust solution for converting higher unregulated voltages into stable lower rails for digital logic and analog circuitry.

Replacement Considerations

Direct pin-compatible substitutes within the same series include LD1086D2Txx variants with different fixed output voltages. For higher current requirements, consider the LD1085D2T33 which shares the D2PAK footprint but delivers 3 A. Verify that any replacement maintains the necessary thermal performance and regulatory approvals for the target application.