The LD1117AG-25-AA3-A-R is a low dropout (LDO) voltage regulator manufactured by UTC (Unisonic Technologies Co., Ltd.). This regulator provides a fixed 2.5V output voltage and is designed to maintain a stable output even with variations in input voltage and load current. It's commonly used in various electronic devices to provide a clean and regulated power supply.

Applications

• Microcontroller power supplies
• Battery-powered devices
• Post-regulation for switching power supplies
• Linear regulation in consumer electronics
• Power management in portable devices

Features

• Fixed 2.5V output voltage
• Low dropout voltage
• Over-temperature protection
• Short-circuit protection
• High output current capability
• Stable with low ESR ceramic capacitors

Benefits

• Stable and accurate voltage regulation: Ensures reliable operation of connected devices.
• Protection against over-temperature and short circuits: Prevents damage to the regulator and connected circuitry.
• Extended battery life: Low dropout voltage improves efficiency, especially in battery-powered applications.
• Simplified design: Requires minimal external components.
• Compact size: Available in small surface-mount packages.

Additional Details

The LD1117AG-25-AA3-A-R is typically available in SOT-223 package. The 'AA3' likely refers to the packaging type, and '-A-R' indicates tape and reel packaging for automated assembly. The regulator can handle a substantial output current, typically up to 800mA or 1A, but this will be specified in the datasheet. Input voltage range is typically up to 15V or 18V. The low dropout voltage allows the regulator to operate with only a small difference between the input and output voltage, improving efficiency. Refer to the UTC datasheet for comprehensive electrical characteristics, thermal resistance, and application recommendations.