3.3V 300mA LDO Voltage Regulator, SOT-23-3

The 3.3V 300mA LDO (Low Dropout) Voltage Regulator is a high-performance, ultra-low dropout (ULDO) component designed for modern, compact electronic devices. It delivers a stable 3.3V output from a minimal input voltage, featuring an exceptionally low typical dropout of just 250mV at full 300mA load, maximising efficiency and battery life in portable applications.

Engineered for superior noise performance, it offers very low output noise and excellent power supply ripple rejection (PSRR of 75dB at 100Hz), making it ideal for sensitive analogue and RF circuitry. A logic-compatible enable/shutdown control input allows for advanced power management, facilitating a low-power shutdown mode with a standby current of just 1µA maximum to significantly extend battery life in handheld products.

The regulator incorporates comprehensive protection features for robust and reliable operation, including overcurrent, overtemperature, and reverse current protection. Its design ensures excellent stability with low-ESR capacitors and provides tight regulation against both load and line variations.

Key Technical Specifications:

• Output Voltage: Fixed 3.3V with a maximum accuracy of ±1%.
• Maximum Output Current: 300mA.
• Input Voltage Range: 2.5V to 13.2V.
• Typical Dropout Voltage: 250mV @ 300mA.
• Standby Current: 0.01µA typical in shutdown mode.
• Output Noise: 260nV/√Hz typical.
• Package: Compact SOT-23-3 surface-mount package.
• Operating Temperature Range: -40°C to +85°C.