LD1086D2M33

Overview

The LD1086D2M33 is a low-dropout positive voltage regulator from STMicroelectronics, providing a fixed 3.3 V output with a maximum current capability of 1.5 A. It utilizes a D²PAK-3 surface-mount package and operates within an extended temperature range of -40 °C to +125 °C. The device features a typical dropout voltage of 1.3 V at full load and maintains high accuracy with an output tolerance of ±1% at 25 °C. Internal protections include thermal limiting and power limiting to ensure reliable operation under varying load conditions.

Feature Summary

• Fixed 3.3 V output voltage with high precision
• Capable of delivering up to 1.5 A continuous output current
• Low dropout voltage characteristic for efficient power management
• Integrated thermal and power limiting protection mechanisms

Applications

• Power supply stages for embedded systems
• Biasing circuits for microcontrollers and digital logic
• Point-of-load regulation in portable electronic devices

Procurement Notes

Verify the specific suffix 'M33' against official manufacturer documentation to confirm the fixed 3.3 V output configuration and D²PAK package variant. Ensure compatibility with standard three-terminal regulator footprints if replacing legacy components. Confirm RoHS compliance status through the latest datasheet revision before finalizing procurement specifications.

Selection Notes

Select this component when a stable 3.3 V rail is required for loads drawing up to 1.5 A. The D²PAK package offers suitable thermal dissipation for moderate power applications. Consider the input voltage headroom relative to the dropout characteristics to maintain regulation. Verify that external capacitor requirements meet the minimum stability criteria specified in the electrical characteristics table.

Part Context

This part belongs to the LD1086 family of low-dropout regulators designed for general-purpose linear voltage regulation. The series includes both adjustable and fixed voltage variants available in multiple packages such as TO-220, DPAK, and DFN8. The LD1086D2M33 specifically addresses applications requiring a fixed 3.3 V supply with robust current handling capabilities in a compact surface-mount form factor.

Replacement Considerations

The LD1086 series is pin-compatible with older three-terminal adjustable regulators. Direct substitutes may include other 1.5 A LDOs in D²PAK packages, provided they match the 3.3 V fixed output and thermal performance requirements.