LM1117MPX-1.8/NOPB

Overview

The LM1117MPX-1.8/NOPB is a fixed-output low-dropout linear regulator manufactured by Texas Instruments, providing a stable 1.8 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 requires a minimum 10-µF tantalum capacitor at the output for stability.

Feature Summary

• Provides fixed 1.8 V output with 800 mA load capability
• Includes integrated current limiting and thermal shutdown protection
• Utilizes Zener-trimmed bandgap reference for high voltage accuracy
• Designed for space-constrained applications via compact SOT-223 packaging

Applications

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

Procurement Notes

Verify the specific suffix 'MPX' corresponds to the tape-and-reel SOT-223 configuration required for your assembly process. Confirm that the 'NOPB' designation ensures compliance with RoHS standards and absence of halogenated flame retardants. Cross-reference the datasheet revision date to ensure alignment with your design's documentation requirements. Validate that the operating temperature range meets your environmental specifications.

Selection Notes

Select this component when a fixed 1.8 V rail is needed with moderate current demands up to 800 mA. Ensure the input voltage provides sufficient headroom above the 1.2 V dropout voltage across all load conditions. Consider the SOT-223 package for surface-mount efficiency. Verify that the system can accommodate the required 10-µF minimum output capacitance to maintain loop stability and transient response performance.

Part Context

This part belongs to the LM1117 family of low-dropout linear regulators from Texas Instruments. The series offers various fixed voltage options and an adjustable version. The MPX suffix indicates the SOT-223 surface-mount package variant. This family is designed for general-purpose power management tasks requiring efficient linear regulation with built-in protection features against overcurrent and overheating scenarios.

Replacement Considerations

The TLV1117 is identified as a newer drop-in alternative. For improved functionality in fixed output SOT-223 configurations, the TLV761 is suggested as a replacement option.