Pololu 9V Step-Up/Step-Down Voltage Regulator S10V3F9
This switching regulator uses the SEPIC topology to produce 9V from input voltages between 2.5V and 18V. The wide input range coupled with its ability to convert both higher and lower input voltages makes it useful for applications where the power supply voltage can vary greatly, as with batteries that start above but discharge below 9V. The compact (0.4″×0.575″) module can supply over 300mA in typical applications.
The Pololu step-up/step-down voltage regulator S10V3F9 is a switching regulator (also called a switched-mode power supply (SMPS) or DC-to-DC converter) with a single-ended primary-inductor converter (SEPIC) topology. It takes an input voltage from 2.5V to 18V and increases or decreases the voltage to a fixed 9V output with a typical efficiency of 70% to 80%.
This flexibility in input voltage is especially well-suited for battery-powered applications in which the battery voltage begins above 9V and drops below as the battery discharges. Since it lacks the typical restriction that the battery voltage stay above the required voltage throughout its life, new battery packs and form factors can be considered. For instance, a 7-cell battery holder, which might have an 11V output with fresh alkalines but an 8.4V nominal voltage with NiMH cells and a 7V output with partially discharged cells, can now be used to produce a steady 9V output.
In typical applications, this regulator can deliver over 300mA continuous; please see the graphs at the bottom of this page for a more detailed characterization. The regulator’s thermal shutdown prevents damage from overheating, but it does not have short-circuit or reverse-voltage protection.
Features
- Input voltage: 2.5V to 18V (can be higher than, the same as, or lower than the 9V output)
- Fixed 9V output with 4% accuracy
- Typical continuous output current: 300mA (actual continuous output current depends on input voltage; see Typical Efficiency and Output Current section below for details)
- <2mA typical no-load quiescent current
- Integrated over-temperature shutoff
- Small size: 0.40″×0.575″×0.1″ (10mm×15mm×3mm)
Dimensions
| Size: | 0.4″ × 0.575″ × 0.1″1 |
|---|---|
| Weight: | 0.6 g1 |
General specifications
| Minimum operating voltage: | 2.5 V |
|---|---|
| Maximum operating voltage: | 18 V |
| Maximum output current: | 300 mA2 |
| Output voltage: | 9 V |
| Reverse voltage protection?: | N |
| Maximum quiescent current: | 2 mA3 |