The LP3981IMMX-3.03 is a low-dropout (LDO) voltage regulator from Texas Instruments (TI), formerly National Semiconductor. This regulator is designed to provide a stable 3.03V output voltage with low noise and high accuracy, making it suitable for powering sensitive analog and digital circuits. It features low quiescent current, over-current protection, and over-temperature protection, ensuring reliable operation in various applications.

Applications:

• Mobile Phones
• PDAs
• Digital Cameras
• MP3 Players
• Other Portable Devices

Features:

• Fixed Output Voltage: 3.03V
• Low Dropout Voltage: 130 mV (typical) at 150mA
• High Output Accuracy: ±1% over temperature range
• Low Quiescent Current: 20 μA (typical)
• Over Current Protection
• Over Temperature Protection
• Input Voltage Range: 2.5V to 6V
• Stable with Ceramic Capacitors
• Package: Micro SMD

Benefits:

• Stable and Accurate Voltage: Ensures consistent performance of powered components.
• Extended Battery Life: Low quiescent current minimizes power consumption in portable devices.
• Overload Protection: Protects the regulator and powered components from damage.
• Thermal Shutdown: Prevents overheating and potential damage to the regulator.
• Compact Size: The Micro SMD package allows for space-saving designs.
• Simplified Design: Requires minimal external components.

Additional Details:

The LP3981IMMX-3.03 is designed to be stable with ceramic capacitors, reducing the overall BOM cost and size. It includes comprehensive protection features such as over-current and over-temperature protection for enhanced reliability. The low dropout voltage enables the regulator to operate with a small difference between the input and output voltages, making it suitable for battery-powered applications where the battery voltage decreases over time. The Micro SMD package is ideal for space-constrained applications.

Technical Specifications:

• Output Voltage: 3.03V
• Input Voltage Range: 2.5V to 6V
• Dropout Voltage: 130mV at 150mA
• Output Current: Up to 150mA
• Quiescent Current: 20 μA
• Output Accuracy: ±1%
• Operating Temperature Range: -40°C to +85°C
• Package: Micro SMD