The LD1117AG-18-TN3-A-R is a low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). It provides a fixed 1.8V output voltage with a maximum output current of 800mA. This LDO regulator is designed for various applications where a stable and regulated voltage supply is required, particularly in battery-powered devices and systems with sensitive electronic components.

Applications

• Microcontroller Power Supplies: Providing a stable 1.8V supply for microcontrollers in embedded systems.
• FPGA Core Voltage Regulation: Regulating the core voltage of FPGAs (Field-Programmable Gate Arrays).
• Post-Regulation for Switching Regulators: Improving the output voltage ripple and noise performance of switching regulators.
• Battery-Powered Devices: Supplying power to devices such as smartphones, tablets, and portable media players.
• Linear Post Regulators: Use as linear post regulators for SMPS.

Features

• Low Dropout Voltage: Operates with a low difference between the input and output voltage, allowing it to function effectively even when the input voltage is close to the desired output.
• Fixed 1.8V Output: Provides a stable and precise 1.8V regulated output voltage.
• 800mA Output Current: Delivers up to 800mA of output current to power various electronic components.
• Over-Temperature Protection: Includes thermal shutdown protection to prevent damage from overheating.
• Short-Circuit Protection: Protects the regulator and the load from damage due to short circuits.
• Current Limiting: Limits the output current to prevent overloading.
• Available in SOT-223 Package: Comes in a small surface-mount SOT-223 package.

Benefits

• Stable Voltage Supply: Provides a consistent and reliable 1.8V output voltage, ensuring proper operation of sensitive electronic components.
• Protection Against Overheating: Thermal shutdown protection prevents damage to the regulator and the load.
• Protection Against Short Circuits: Short-circuit protection enhances the reliability of the system.
• Efficient Operation: Low dropout voltage improves efficiency, especially in battery-powered applications.
• Compact Size: SOT-223 package allows for easy integration into space-constrained designs.

Additional Details

The LD1117AG-18-TN3-A-R has a typical dropout voltage of around 1.2V at the rated current. It is designed to operate over a wide temperature range. Consult the UTC datasheet for specific electrical characteristics, application notes, and soldering recommendations. The SOT-223 package is suitable for automated assembly processes.