The LD3985M18R is a high-performance, low-dropout voltage regulator from STMicroelectronics, meticulously engineered to deliver a stable and efficient power supply. This device is ideal for battery-operated systems, portable devices, and other applications where energy efficiency and voltage stability are critical.

Key Features

• Output Voltage: The LD3985M18R provides a fixed output voltage of 1.8V, which is suitable for powering low-voltage digital circuits and microcontroller-based systems.
• Low Dropout: With a very low dropout voltage, this regulator maintains a consistent output even when the supply voltage is close to the output voltage, ensuring reliable performance and extended battery life.
• High Accuracy: The output voltage tolerance is within ±1%, which means devices powered by the LD3985M18R can expect a stable voltage supply for optimal operation.
• Low Quiescent Current: Its low ground current at light loads contributes to the overall energy efficiency of the system, making it an excellent choice for portable and battery-powered applications.
• Thermal Shutdown and Short-Circuit Protection: Built-in safety features protect the device and the system from damage due to overheating or short-circuit conditions.
• Wide Operating Temperature Range: The regulator can operate over a broad temperature range, making it versatile for use in various environmental conditions.

Applications

The LD3985M18R is designed for a wide array of applications, including but not limited to:

• Mobile phones and personal digital assistants (PDAs)
• Portable media players and audio devices
• Wireless communication systems
• Microcontroller power supply
• Portable gaming devices

Package Information

The LD3985M18R comes in a small SOT-23 package, which is advantageous for space-constrained applications. Its compact size allows for efficient use of PCB real estate, while still offering excellent thermal performance.

Conclusion

With its combination of features, the LD3985M18R from STMicroelectronics stands out as a reliable and efficient solution for applications requiring precise voltage regulation. Its protective features and low-power consumption make it an ideal choice for designers looking to enhance the performance and longevity of their portable and low-voltage devices.