The AMS1117CD-2.85 is a low dropout (LDO) linear regulator from Advanced Monolithic Systems, designed to provide a stable and regulated 2.85V output voltage. It is capable of delivering up to 1A of output current, making it suitable for a variety of applications requiring a regulated voltage source. This LDO regulator is known for its low dropout voltage, which allows it to maintain regulation even when the input voltage is only slightly higher than the desired output voltage.

Applications:

• Post Regulation for Switching Regulators: Provides a clean and stable voltage after an initial switching regulation stage.
• Battery Chargers: Used in battery charging circuits to provide a constant voltage for charging batteries.
• Microcontroller Power Supplies: Supplies stable power to microcontrollers and other digital logic devices.
• Instrumentation: Powers sensitive electronic instruments requiring a clean and regulated voltage.
• Linear Regulators for Motherboards: Supplies power to various components on computer motherboards.

Features:

• Low Dropout Voltage: Typically 1.3V at 1A output current, allowing operation with minimal input-output voltage differential.
• Adjustable or Fixed Output Voltage: Fixed 2.85V output voltage.
• Current Limiting: Protects the regulator and the load from overcurrent conditions.
• Thermal Overload Protection: Shuts down the regulator if the junction temperature exceeds a safe limit.
• Reverse Battery Protection: Prevents damage to the regulator if the input voltage is accidentally reversed.
• Three-Terminal Adjustable or Fixed Output: Easy to use and integrate into existing circuits.

Benefits:

• Stable Output Voltage: Provides a consistent and reliable 2.85V output, ensuring proper operation of connected devices.
• Protection Features: Built-in current limiting and thermal shutdown protect the regulator and the load from damage.
• Easy to Use: Simple three-terminal design allows for easy integration into a variety of circuits.
• Efficient Regulation: Low dropout voltage minimizes power dissipation and improves efficiency.
• Wide Operating Temperature Range: Suitable for use in a variety of environmental conditions.

Additional Details:

The AMS1117CD-2.85 is typically available in a surface-mount package, such as SOT-223. It requires external capacitors for stable operation, typically a tantalum or electrolytic capacitor on the input and output. The input capacitor should be placed close to the input pin of the regulator, and the output capacitor should be placed close to the output pin. The regulator is designed to operate over a wide temperature range, typically from -40°C to +125°C. It is crucial to consult the datasheet for the manufacturer's recommended operating conditions and component values to ensure proper and reliable operation.