The LM321SN3T1G is a low power, high performance, low dropout (LDO) voltage regulator manufactured by ON Semiconductor. It has a wide input voltage range of 3.3V to 24V, and can provide a regulated output voltage of 3.0V, 5.0V, or an adjustable output range of 1.2V to 5.0V. The LM321SN3T1G offers an ultra-low quiescent current of typically 5 µA, load regulation of 0.1% (maximum) over line and load regulation of 0.3% (maximum), as well as thermal protection and short circuit protection for improved reliability. It is available in a small SOT-23 package, making it ideal for space-constrained applications.