LM1117DT-2.5

Overview

The LM1117DT-2.5 is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed 2.5 V output with an 800 mA load current capability. The device operates within an input voltage range of 3.9 V to 10 V and features a typical dropout voltage of 1.2 V at full load. It utilizes a TO-252 (DPAK) surface-mount package and supports operation from -40°C to +125°C.

Feature Summary

• Provides stable 2.5 V regulated output for precision power applications
• Enables efficient voltage conversion with minimal heat generation due to low dropout characteristics
• Integrates internal protection mechanisms against overload and thermal stress

Applications

• SCSI-2 active terminators
• Post-regulation stages in switch-mode DC/DC converters
• Battery-powered instrumentation requiring precise voltage rails

Procurement Notes

Verify the manufacturer designation on the datasheet, as Texas Instruments acquired National Semiconductor. Confirm the suffix indicates lead-free compliance if required by assembly specifications. Ensure the TO-252 package matches the PCB footprint design constraints before finalizing procurement orders.

Selection Notes

Select this component when a fixed 2.5 V rail is required with up to 800 mA capacity. It serves as a direct replacement for older LM1117 variants in existing designs. Consider thermal dissipation requirements based on the difference between input and output voltages during high-load operations.

Part Context

This part belongs to the LM1117 family of low-dropout regulators known for compatibility with standard three-terminal adjustable regulators. The DT suffix denotes the TO-252 surface-mount package variant. The series is widely used in consumer electronics and industrial systems requiring reliable linear regulation.

Replacement Considerations

LM1117DT-2.5/NOPB