The LD1117AL-12-TN3-A is a low dropout (LDO) positive voltage regulator from Unisonic Technologies Co. (UTC), designed to provide a stable 12V output. It is capable of supplying up to 800mA of output current and features a low dropout voltage, making it suitable for applications where the input voltage is close to the desired output voltage.

Applications:

• Post Regulation for Switching Power Supplies
• Battery Chargers
• Voltage Regulation in Consumer Electronics
• Power Management for Microcontrollers and DSPs
• Industrial Control Systems

Features:

• Fixed 12V Output Voltage: Provides a stable and precise 12V output.
• Low Dropout Voltage: Operates with a small difference between input and output voltage.
• 800mA Output Current Capability: Suitable for applications requiring moderate current.
• Internal Current Limiting: Protects the regulator and connected circuits from overcurrent conditions.
• Thermal Overload Protection: Prevents overheating and damage to the regulator.

Benefits:

• Stable Voltage Supply: Ensures consistent performance of connected devices.
• Efficient Power Conversion: Low dropout voltage improves efficiency in low voltage applications.
• Protection Against Overloads and Short Circuits: Enhances system reliability.
• Simplified Circuit Design: Requires minimal external components.
• Cost-Effective Solution: Provides a low-cost solution for voltage regulation.

Technical Specifications:

The LD1117AL-12-TN3-A has an output voltage of 12V with an accuracy of ±4%. The input voltage range is typically 13V to 18V. The dropout voltage is typically 1.2V at 800mA. It is available in a SOT-223 package. Operating junction temperature range is -40°C to +125°C. Line regulation is typically 0.2%/V and load regulation is 0.4%. It includes current limiting and thermal shutdown protection.

The device is designed for applications requiring a stable 12V supply with minimal voltage difference between input and output. The internal protection features ensure reliable operation and prevent damage from common electrical faults. Its low dropout voltage and efficient power conversion make it a good choice for battery-powered devices and other applications where power efficiency is critical. The SOT-223 package provides good thermal performance and is suitable for surface mount assembly.