The LM1086ISX-2.85 is a 1.5A Low Dropout (LDO) positive voltage regulator manufactured by National Semiconductor (now Texas Instruments). It is designed to provide a stable and regulated 2.85V output voltage from a higher input voltage with minimal voltage drop. This regulator is suitable for applications where a precise and stable voltage is crucial, such as powering microprocessors, memory, and other sensitive electronic components in various electronic devices.

Applications

• Microprocessor Power: Provides a stable 2.85V supply for microprocessors and microcontrollers.
• Memory Power: Regulates the voltage for RAM, ROM, and other memory devices requiring 2.85V.
• Post Regulation for Switching Supplies: Used to reduce ripple and noise from switching power supplies.
• Battery-Powered Systems: Efficient voltage regulation for portable devices.
• Instrumentation: Powers sensitive instrumentation equipment requiring a stable 2.85V supply.

Features

• 1.5A Output Current: Delivers up to 1.5A of output current for moderate power applications.
• Low Dropout Voltage: Operates with minimal voltage difference between input and output, enhancing efficiency.
• Fixed 2.85V Output: Provides a stable and regulated 2.85V output voltage.
• Overcurrent Protection: Protects the regulator and connected devices from damage due to excessive current.
• Thermal Shutdown Protection: Shuts down the regulator if the junction temperature exceeds a safe limit.
• Internal Current Limiting: Prevents damage due to overload conditions.

Benefits

• Stable Output Voltage: Ensures consistent performance of connected devices by providing a stable voltage supply.
• Improved Efficiency: Low dropout voltage minimizes power losses, improving overall efficiency.
• Enhanced System Reliability: Protection features prevent damage to the regulator and connected devices.
• Simplified Design: Requires minimal external components, simplifying circuit design.
• Cost-Effective Solution: Offers a reliable and efficient voltage regulation solution.

Additional Details

The LM1086ISX-2.85 typically comes in a surface-mount package such as a D2PAK (TO-263) or a through-hole package like a TO-220. The 'ISX' likely indicates the surface mount package. The required input voltage must be slightly higher than 2.85V, typically around 4V or higher, depending on the output current. External capacitors are recommended at the input and output for stability and transient response. Consult the manufacturer's datasheet for detailed electrical characteristics, thermal considerations, and application circuit examples.