The LT1117CST-3.3#PBF is an LDO Voltage Regulator 3.3V Low Dropout Regulator manufactured by Analog Devices. It is a low dropout (LDO) voltage regulator that produces a low-voltage, and low-drop output from a higher input voltage. It operates from input of 4.5V to 40V, and is capable of up to 1.5A of output current. Its high power supply rejection ratio makes it ideal for applications that require a low noise, accurate output even in noisy power supply environments. It has an adjustable voltage regulation of 3.3V and is protected against short circuit current & over-temperature conditions. This part also features extended temperature range operation, low quiescent current, and a wide input/output differential of only 3mV to maintain tight regulation. The LT1117CST-3.3#PBF provides good performance characteristics in applications such as amplifiers, motor controllers, power supplies, and instrumentation systems.