LM1117IDT-5.0/NOPB

Overview

The LM1117IDT-5.0/NOPB 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 extended industrial temperature range from -40°C to +125°C and utilizes the TO-252 (NDP) surface-mount package. The device incorporates internal current limiting and thermal shutdown protection mechanisms. It requires a minimum 10 µF tantalum capacitor at the output for stability and achieves a typical ripple rejection ratio of 75 dB at 120 Hz.

Feature Summary

• Integrated current limiting and thermal shutdown circuitry for robust operation under fault conditions
• Zener-trimmed bandgap reference ensures precise output voltage accuracy within ±1% tolerance
• Low dropout voltage capability maintains regulation with minimal input-to-output differential
• High ripple rejection performance minimizes power supply noise in sensitive applications

Applications

• AC drive power stage modules
• Merchant network and server PSU
• Industrial AC/DC converters
• Ultrasound scanners
• Servo drive control modules

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm RoHS compliance status as indicated in official documentation. Ensure the procurement channel sources genuine components directly from authorized distributors or the manufacturer to prevent counterfeit parts. Validate that the component lot aligns with current production data sheets.

Selection Notes

Select this component when a fixed 5 V rail is required with up to 800 mA capacity in space-constrained designs. The LM1117I variant specifically supports harsh environments requiring operation down to -40°C. Designers must account for the thermal resistance characteristics of the TO-252 package and ensure adequate PCB copper area for heat dissipation to maintain junction temperatures within safe limits during high-load operations.

Part Context

This part belongs to the LM1117 family of low-dropout regulators, which also includes adjustable versions and other fixed voltage options like 3.3 V and 2.5 V. The 'I' designation indicates the industrial temperature grade, distinguishing it from the commercial grade LM1117. The 'DT' suffix specifies the TO-252 surface-mount package configuration, while '/NOPB' denotes lead-free and halogen-free construction compliant with environmental standards.

Replacement Considerations

For drop-in replacements in fixed output SOT-223 package configurations with improved functionality, see the TLV761. For newer general alternatives, see the TLV1117.