Fixed Low Dropout Voltage Regulator with Enable, 2.5V to 16V, 150mA

The Fixed Low Dropout Voltage Regulator is a micropower, ultra-low noise LDO (low dropout) regulator designed for superior performance in battery-powered applications. It provides a stable 3.3V output with 1% tolerance, delivering up to 150mA of output current. Operating from an input voltage range of 2.5V to 16V, it features an exceptionally low dropout voltage of just 280mV at the full 150mA load, maximising efficiency and battery life.

Constructed using an optimised VIP (Vertically Integrated PNP) process, this regulator is engineered to work with very low ESR (Equivalent Series Resistance) output capacitors, including ceramic types with ESR as low as 5 milliohms. It boasts a quiescent current of only 75µA at a 1mA load and 850µA at 150mA, ensuring minimal power draw during operation. When shut down, the device consumes less than 1µA. A key feature is its low noise output, which can be further reduced to 30µVrms (within a 30kHz bandwidth) by adding a small 10nF bypass capacitor.

Key Features & Specifications

• Precision Output: Guarantees a fixed 3.3V output voltage with 1% accuracy (A grade).
• High Efficiency: Ultra-low dropout voltage of 280mV at 150mA extends usable battery voltage range.
• Low Noise & Quiescent Current: Ideal for sensitive analog circuits and power-conscious designs.
• Robust Protection: Includes built-in overtemperature and overcurrent protection for enhanced circuit safety and reliability.
• Compact Package: Supplied in a space-saving, surface-mount 5-pin SOT-23 package for high-density PCB designs.
• Wide Temperature Range: Operates across a junction temperature range of -40°C to 125°C, suitable for industrial and consumer environments.

This regulator is a cornerstone component for power management, offering high peak current capability and low ground pin current across all load conditions.