Texas Instruments

LM1117MPX-1.8

LM1117MPX-1.8 Description

The LM1117MPX-1.8 from Texas Instruments is a low-dropout (LDO) linear voltage regulator designed to deliver a fixed 1.8V output with a maximum current of 0.8A. Housed in a 4-pin (3+Tab) SOT-223 package, it is optimized for surface-mount applications and supplied in tape and reel (T/R) packaging for automated assembly. This regulator operates over a wide input voltage range of 2.6V to 15V, making it suitable for various power supply designs. With ±1% output voltage accuracy, it ensures stable performance in precision applications.

LM1117MPX-1.8 Features

• Low Dropout Voltage: 1.25V @ 500mA, 1.2V @ 100mA, and 1.3V @ 800mA, enhancing efficiency in low-voltage applications.
• Robust Protection: Integrated current limiting and thermal shutdown for reliable operation under fault conditions.
• High Accuracy: ±1% output voltage tolerance ensures consistent performance.
• Low Quiescent Current: 10mA max, reducing power loss in standby modes.
• Wide Temperature Range: Operates from 0°C to 125°C, suitable for industrial environments.
• Compact Design: SOT-223 package (6.5mm x 3.56mm x 1.6mm) with a thermal tab for improved heat dissipation.
• Regulation Performance: 1mV typical line and load regulation for stable output under varying conditions.

LM1117MPX-1.8 Applications

• Embedded Systems: Powering microcontrollers, FPGAs, and DSPs requiring a stable 1.8V supply.
• Consumer Electronics: Used in set-top boxes, routers, and portable devices for voltage regulation.
• Industrial Controls: Ideal for sensor interfaces, PLCs, and automation systems due to its wide operating temperature range.
• Networking Equipment: Provides clean power for Ethernet switches, PoE modules, and RF circuits.
• Battery-Powered Devices: Efficiently regulates voltage in IoT nodes and wireless sensors with low dropout.

Conclusion of LM1117MPX-1.8

The LM1117MPX-1.8 is a high-performance LDO regulator offering precision, efficiency, and robustness in a compact form factor. Its low dropout, thermal protection, and wide input range make it superior to basic linear regulators, particularly in space-constrained and thermally challenging designs. While not RoHS-compliant, its reliability and ease of integration make it a preferred choice for industrial, consumer, and embedded applications demanding stable 1.8V power. Engineers can leverage its excellent regulation and protection features to enhance system longevity and performance.