The HPA00537PWPRG4 is a low-dropout voltage regulator from Texas Instruments. It is an ultra-low-noise and low-dropout linear regulator with a wide input voltage range of 1.5 V to 18 V and an output voltage range of 1.2 V to 17 V. It has a very low sample-and-hold noise of 2.3 mVrms and a current-limited dropout voltage of 150 mV. The device offers low noise, fast transient response, and excellent thermal stability. It is suitable for use in automotive, industrial, and consumer applications, as well as in portable and hand-held devices.