The SPX3819M5-L-1.8/TR is a low dropout (LDO) linear regulator from Exar Corporation. This regulator is designed to provide a stable and accurate 1.8V output voltage, making it suitable for a wide range of applications requiring a regulated 1.8V power supply.

Applications:

• Microcontroller Power: Commonly used to supply power to microcontrollers requiring a precise 1.8V voltage rail.
• Portable Electronics: Used in portable devices such as smartphones, tablets, and other battery-powered gadgets.
• Post Regulation for Switching Supplies: Provides clean and stable voltage source after switching power supply.
• Battery-Powered Systems: Highly suitable for battery-operated systems needing a stable 1.8V supply.
• Memory Power: Used to power memory devices, such as SDRAM and flash memory.

Features:

• Low Dropout Voltage: Operates with a minimal voltage difference between input and output, maximizing efficiency and battery life.
• High Output Accuracy: Delivers a precise and stable 1.8V output voltage, ensuring reliable operation of connected components.
• Overcurrent Protection: Includes built-in overcurrent protection to prevent damage from short circuits or excessive loads.
• Thermal Shutdown Protection: Protects the regulator from overheating by shutting down the output when the junction temperature exceeds a safe threshold.
• Stable with Ceramic Capacitors: Designed for stability with low-ESR ceramic output capacitors, minimizing solution size and cost.
• Fixed Output Voltage: Provides a fixed 1.8V output, simplifying design and eliminating the need for external voltage setting resistors.
• Small Package: Housed in a compact SOT-23-5 package, reducing board space requirements.

Benefits:

• Improved System Performance: Provides a clean and stable power supply, enhancing the performance and reliability of connected circuits.
• Extended Battery Life: Low dropout voltage and high efficiency minimize power losses, extending the operational life of battery-powered devices.
• Simplified Design: Fixed output voltage and stability with ceramic capacitors simplify design and reduce the component count.
• Enhanced Protection: Overcurrent and thermal shutdown protection safeguard the regulator and connected components from damage.
• Reduced Board Space: Small package size minimizes board space requirements, enabling more compact designs.
• Cost-Effective Solution: Offers high-performance and reliable power regulation at a competitive cost.

Additional Details:

The SPX3819M5-L-1.8/TR typically features a dropout voltage of around 200mV at a 150mA load current. It operates with input voltages up to 5.5V. The regulator is packaged in SOT-23-5 and is RoHS compliant. The /TR suffix indicates tape and reel packaging for automated assembly processes.