The POLOLU-2099 is a 6V, 420mA 2-terminal step-up voltage regulator module produced by Pololu. It is designed for use in circuits where an input voltage of up to 6V needs to be stepped up to a more useful voltage, such as 9V, 12V, or 18V. It can provide a maximum of 420mA of current, and its two connections are an input and an output. The input can accept up to 6V of direct current, while the output is adjustable from 7V to 32V. It has an efficient synchronous boost design, and its maximum efficiency is 90%. Additionally, it features an adjustable output voltage and current limiting protection, allowing for greater control over the output power. The POLOLU-2099 is a versatile and user-friendly module, making it a great choice for plenty of different circuit designs.