LM1117IMPX-5.0

Overview

The LM1117IMPX-5.0 is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 5V output with a maximum load current of 800mA. It features a dropout voltage of 1.2V at full load and maintains output accuracy within ±1%. The device operates within a junction temperature range of 0°C to 125°C and includes integrated current limiting and thermal shutdown protection. It utilizes a Zener-trimmed bandgap reference for precision.

Feature Summary

• Fixed 5V output with ±1% accuracy
• Integrated current limiting and thermal shutdown
• Low dropout performance at high currents

Applications

• Post regulator for switching DC-DC converters
• Battery chargers
• Portable instrumentation power supplies

Procurement Notes

Verify the specific suffix 'IMPX' against the manufacturer's latest orderable addendum to confirm package type and tape-and-reel specifications. Ensure the operating environment remains within the 0°C to 125°C junction temperature limit. Confirm that the input voltage does not exceed the absolute maximum rating of 20V to prevent device damage.

Selection Notes

Select this component when a fixed 5V rail is required with up to 800mA capacity. Ensure the application can accommodate the mandatory minimum 10µF tantalum output capacitor for stability. Verify that the input-to-output differential voltage stays above the dropout threshold across all expected load and temperature conditions.

Part Context

This part belongs to the LM1117 family of low-dropout regulators from Texas Instruments. It shares pin compatibility with industry-standard three-terminal regulators like the LM317 but offers lower dropout voltage and higher current capability. The 'I' suffix denotes an extended industrial temperature range, while 'MPX' indicates the SOT-223 surface-mount packaging configuration.

Replacement Considerations

LM1117MPX-5.0/NOPB