The Pololu S8V3A voltage regulator is a switching regulator or switched-mode power supply (SMPS) or DC-to-DC converter with a single-ended primary-inductor converter (SEPIC) topology. It takes an input voltage between 1.5 V to 12 V that can be increased or decreased with a screwdriver by turning the potentiometer. The output voltage produces ranges between 2V and 12V and can be verified using a multimeter. The output current is 300mA. This device is well-suited for battery-powered applications in which the output voltage is decreasing while battery is discharging.

The S8V3A regulator has a shutdown feature that can also be used as an under-voltage protection mechanism for batteries that respond poorly to being over-discharged. The shutdown threshold can be set with one external resistor; please see the Shutdown section below for details.

The regulator has under-voltage protection, and thermal shutdown prevents damage from overheating; the board does not have reverse-voltage protection. For applications where the output is significantly different from the input, a regulator optimized for boosting (stepping up) or bucking (stepping down) is more efficient, but for small applications where efficiency is not a top priority, this board can be a convenient.


  • output voltage that can be higher than, the same as, or lower than the input voltage
  • recommended input voltage: 2 to 12 V
  • adjustable output voltage between 2 and 12 V
  • typical continuous output current: 300 mA (Actual continuous output current depends on input voltage)
  • 1.5 MHz switching frequency
  • integrated over-temperature protection

Part List

  • 1x voltage regulator
  • 1x 1x4 2.54 mm male header
  • 1x 1x4 2.54 mm right angle male header


Dimensions L x W x H 1.75 cm x 1.0 cm x 0.4 cm
Input Voltage (Limits) 1.5 V to 16 V
Power Supply
Output Current (Limits) 300 mA
Output Voltage 2V to 12V

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Pololu Adjustable Step-Up/Step-Down Voltage Regulator S8V3A

  • Pololu
  • Pololu Voltage Regulator S8V3A to regulate battery current and voltage.
  • --
  • Availability: 10 (Canada)
  • $ US9.00 $ US5.00
  • USD 200.00 Left For Free Shipping

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Tags: pololu, step-up, step-down, buck-boost converter