The Pololu 3.3V Step-Up/Step-Down Voltage Regulator S8V9F3 is a highly efficient, synchronous switching regulator that delivers a consistent 3.3V output from a wide range of input voltages (1.4V to 16V). It is worth noting that the minimum startup voltage is 2.7V, but it can operate down to 1.4V thereafter. This regulator's ability to convert both higher and lower input voltages makes it exceptionally versatile, particularly in applications where the power supply voltage can fluctuate significantly. This is often the case with batteries that start above and then discharge below 3.3V. The S8V9F3 regulator's output current typically ranges between 1A and 1.5A for input voltages close to the output, demonstrating its reliable performance. For added functionality, this regulator features an optional enable input. This allows the regulator to enter a low-power state, drawing less than 15µA per volt on VIN, thereby conserving energy. Measuring a compact 10.16mm x 16.51mm, this regulator is designed to fit seamlessly into a variety of applications without adding unnecessary bulk. It also boasts an impressive efficiency rate of between 80% and 90%, ensuring optimal performance at all times. In summary, the Pololu 3.3V Step-Up/Step-Down Voltage Regulator S8V9F3 is a compact, efficient, and versatile solution for managing a wide range of input voltages. With its optional low-power state and high efficiency rate, it is an ideal choice for a variety of applications requiring reliable voltage regulation.