LM1117MPX-1.8

Overview

The LM1117MPX-1.8 is a fixed-output low-dropout linear regulator manufactured by National Semiconductor, now part of Texas Instruments. It provides a stable 1.8V output with a maximum load current capability of 800mA. The device features a typical dropout voltage of 1.2V at full load and maintains an output accuracy within ±1%. It operates with an input voltage range up to 15V and includes internal thermal shutdown and current limiting protection circuits.

Feature Summary

• Fixed 1.8V output voltage with ±1% precision
• Integrated thermal shutdown and current limiting protection
• Low dropout voltage operation for efficient power management

Applications

• Power supply modules requiring regulated 1.8V rails
• Battery-powered equipment utilizing linear regulation
• Embedded systems and microcontroller logic level powering

Procurement Notes

Verify the manufacturer origin carefully as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific suffix indicates lead-free (Pb-free) compliance if required by your assembly process. Ensure the package type matches your PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed 1.8V rail is needed with moderate current demands up to 800mA. Consider the thermal dissipation capabilities in your enclosure design due to the linear regulation nature. Verify that the input voltage remains within the specified maximum limits to ensure reliable operation.

Part Context

This component belongs to the LM1117 family of low-dropout regulators known for their industry-standard pinout compatibility with older adjustable regulators like the LM317. The MPX suffix denotes the SOT-223 surface-mount package variant, designed for compact board layouts while maintaining adequate heat dissipation through the exposed tab.

Replacement Considerations

LM1117MPX-1.8/NOPB