LD1117DT25TR

Overview

The LD1117DT25TR is a positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 2.5V with a maximum continuous output current capability of 800mA. The device operates within an input voltage range up to 15V and utilizes the SOT-223 surface-mount package, which features four pins. Key electrical characteristics include a typical dropout voltage of 1V at full load, a quiescent current of 5mA, and an output voltage tolerance of ±1% at 25°C. The component incorporates internal thermal overload protection and current limiting to ensure operational safety under fault conditions.

Feature Summary

• Fixed 2.5V output voltage with high precision tolerance
• Integrated thermal shutdown and current limit protection circuits
• SOT-223 surface-mount packaging for optimized thermal performance

Applications

• Portable battery-powered equipment requiring stable low-voltage rails
• Embedded systems and microcontroller power supplies
• General-purpose linear regulation in consumer electronics

Procurement Notes

Verify the specific suffix 'DT' against the manufacturer's latest datasheet to confirm the exact package variant and tape-and-reel specifications. Ensure that the required output voltage matches the fixed 2.5V configuration, as this part number does not support adjustable outputs. Confirm compliance requirements such as RoHS status directly from the official product documentation before finalizing procurement orders.

Selection Notes

Select this component when a fixed 2.5V supply is required with moderate current demands up to 800mA. The SOT-223 package is suitable for applications where space efficiency and thermal dissipation are balanced priorities. Consider the minimum dropout voltage constraints relative to the input source to maintain regulation. This regulator is appropriate for non-critical noise-sensitive applications given its standard power supply rejection ratio.

Part Context

This component belongs to the LD1117 family of low-dropout regulators produced by STMicroelectronics. The series offers various fixed output voltages and adjustable versions across multiple package types including TO-220, DPAK, and SO-8. The LD1117DT25TR specifically represents the 2.5V fixed output variant housed in the SOT-223 surface-mount footprint, designed for efficient power management in compact electronic designs.

Replacement Considerations

Consult the official STMicroelectronics replacement guide or cross-reference database for verified substitute part numbers. Generic LDO replacements may differ in pinout, thermal resistance, or electrical tolerances. Do not assume compatibility without verifying datasheet parameters against the original design requirements.