LM1117IDTX-5.0

Overview

The LM1117IDTX-5.0 is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 5 V output with a maximum load current of 800 mA. It operates within an input voltage range up to 15 V and features a typical dropout voltage of 1.2 V at full load. The device incorporates internal current limiting and thermal shutdown protection mechanisms. It utilizes a Zener-trimmed bandgap reference to ensure output voltage accuracy within ±1%. The component is housed in a space-saving SOT-223 package and is designed for operation across a temperature range of 0°C to 125°C.

Feature Summary

• Provides a fixed 5 V output regulated from an input supply up to 15 V
• Delivers up to 800 mA of continuous output current capability
• Includes integrated current limiting and thermal shutdown circuitry
• Utilizes a Zener-trimmed bandgap reference for high voltage accuracy

Applications

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

Procurement Notes

Verify the specific suffix 'IDTX' against the manufacturer's official orderable addendum to confirm the exact package type (SOT-223) and tape-and-reel packaging configuration. Ensure the operating temperature grade matches the system requirements, as the 'I' designation indicates extended range capabilities compared to standard variants. Cross-reference the datasheet revision history for any recent changes to electrical characteristics or pin configurations.

Selection Notes

Select this component when a fixed 5 V rail is required with moderate current demands up to 800 mA. The low dropout characteristic makes it suitable for applications where the input voltage is close to the desired output level. Consider the thermal resistance of the SOT-223 package and potential power dissipation when designing the PCB layout to ensure junction temperatures remain within safe limits under maximum load conditions.

Part Context

This part belongs to the LM1117 family of low-dropout linear regulators from Texas Instruments. The family offers both adjustable and fixed voltage options, including 1.8 V, 2.5 V, 3.3 V, and 5 V outputs. The LM1117 series is known for its robust protection features and ability to drive significant loads while maintaining stability with minimal external components, specifically requiring a minimum output capacitance for transient response improvement.

Replacement Considerations

LM1117IDT-5.0/NOPB