The ZD1117ILT-R18 is a linear voltage regulator with an SOT-223 packaging manufactured by Zetta. It is a low dropout (LDO) regulator, which means it maintains high efficiency when providing regulated voltage by consuming a minimum amount of current. It offers an output voltage range from 1.2V to 5V with adjustable current limit from 3mA to 2A. It is RoHS compliant and has an operating junction temperature range of -20°C to 105°C. It supports input voltage from 2.5V to 26V and has built-in over-temperature protection with power good signal. Additionally, it provides a low output ripple voltage and low noise levels.