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The S9V11x family of efficient switching regulators (also called switched-mode power supplies (SMPS) or DC-to-DC converters) use a buck-boost topology to convert both higher and lower input voltages to a regulated output voltage. They take input voltages from 2 V to 16 V and increase or decrease them as necessary, offering a typical efficiency of over 85% and a typical output current of up to 1.5 A. The flexibility in input voltage offered by this family of regulators is especially well-suited for battery-powered applications in which the battery voltage begins above the regulated voltage and drops below as the battery discharges. Without the typical restriction on the battery voltage staying above the required voltage throughout its life, new battery packs and form factors can be considered.
The different members of this family offer different output voltage options, from fixed voltages with selectable alternatives to adjustable voltages that can be set anywhere between 2.5 V and 9 V using a precision 11-turn potentiometer. Some versions also have an adjustable low-voltage cutoff that can be set anywhere in the 2 V to 16 V output voltage range and used to prevent your battery from over-discharging. This is particularly useful for battery chemistries that can be damaged when over-discharged, including Li-ion and LiPo. The chart below lists all the regulators in the S9V11x family along with the key features of each version:
2.5 V – 9 V (fine-adjust) | ||
3.3 V (5 V selectable) | fine-adjust | |
3.3 V (5 V selectable) | 3 V (fixed) | |
0.3" × 0.45" × 0.15"1 | ||
Weight: | 0.5 g1 |
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General specifications
Minimum operating voltage: | 2 V2 |
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Maximum operating voltage: | 16 V |
Maximum output current: | 1.5 A3 |
Output voltage: | 5 V |
Reverse voltage protection?: | N |
Maximum quiescent current: | 0.2 mA4 |
Identifying markings
PCB dev codes: | reg20a |
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Other PCB markings: | 0J10393 |
Notes:
File downloads
Dimension diagram of the Pololu 5V Step-Up/Step-Down Voltage Regulator S9V11F5 (138k pdf)
3D model of the Pololu 5V Step-Up/Step-Down Voltage Regulator S9V11F5 (3MB step)
Drill guide for the Pololu 5V Step-Up/Step-Down Voltage Regulator S9V11F5 (16k dxf)
This DXF drawing shows the locations of all of the board’s holes.
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Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
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