The LP2981IM5X-3.3/NOPB from Texas Instruments is a high-performance, low-dropout regulator that offers a combination of precision output, low noise operation, and advanced protection features.

• Output Voltage: 3.3V fixed
• Maximum Output Current: 100mA
• Dropout Voltage: Typically 1mV at light loads, 380mV at 100mA
• Output Noise Voltage: 30µVRMS (typical) with bypass capacitor
• Quiescent Current: Less than 1µA (in shutdown mode)
• Features: Thermal shutdown, short circuit current limit, error flag
• Operating Temperature Range: -40°C to 125°C
• Package: SOT-23