LD1086D2T33TR

Overview

The LD1086D2T33TR is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum current capacity of 1.5 A. The device operates within an input voltage range up to 30 V and maintains performance across a wide temperature spectrum from -40 °C to +125 °C. Packaged in a surface-mount D²PAK (TO-263-3) format, it features internal thermal overload and short-circuit protection. The quiescent current is specified at 5 mA, and the typical dropout voltage is 1.3 V at full load.

Feature Summary

• Fixed 3.3 V output voltage with ±1% tolerance at 25 °C
• High efficiency design where quiescent current flows into the load rather than being wasted
• Integrated thermal shutdown and current limiting for robust operation under fault conditions
• Requires only a minimum 10 μF output capacitor for stability

Applications

• Industrial control systems requiring stable power in high-temperature environments
• Automotive electronics operating within extended temperature ranges
• Portable devices needing efficient step-down regulation from higher bus voltages

Procurement Notes

Verify the specific suffix 'D2T' confirms the D²PAK package and 3.3 V fixed output variant. Ensure compatibility with standard TO-263 footprints during PCB layout. Confirm RoHS compliance status if required by local regulations. Cross-reference datasheet revision dates to ensure parameter consistency. Validate supplier authenticity through authorized distribution channels.

Selection Notes

Select this component when a fixed 3.3 V rail is required with up to 1.5 A load capability. It is suitable for replacing older adjustable regulators due to pin compatibility while offering superior dropout performance. Consider the D²PAK package for applications requiring improved thermal dissipation compared to smaller SOT packages. Evaluate input voltage headroom against the 1.3 V typical dropout specification.

Part Context

This part belongs to the LD1086 series of positive low-dropout regulators. The series includes adjustable versions and other fixed voltage options such as 1.8 V, 5 V, and 2.5 V. The D2T33 designation specifically identifies the 3.3 V fixed output variant housed in the D²PAK surface-mount package, distinguishing it from through-hole or adjustable counterparts.

Replacement Considerations

Pin-compatible replacements include other LD1086 variants with matching output voltages. Verify that substitute components maintain the same 1.5 A current rating and thermal protection features. Check for equivalent dropout characteristics to ensure circuit stability under varying load conditions.