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Step-Down Voltage Regulator D15V70F5S3
  • Step-Down Voltage Regulator D15V70F5S3
  • Step-Down Voltage Regulator D15V70F5S3
  • Step-Down Voltage Regulator D15V70F5S3

Step-Down Voltage Regulator D15V70F5S3

Product Code : 11763 Brand / Origin :  Pololu
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Price: 25,00 USD Reduced: 18,75 USD
In Stock : 23

D15V70F5S3 Step-Down Voltage Regulator Board regulates voltage values from 4.5 V - 24 V to 3.3 V - 5 V and it can deliver up to 7 A continuous in typical applications.

The output voltage defaults to 5 V and can be changed to 3.3 V.

The regulator has under-voltage and short-circuit protection, and thermal shutdown prevents damage from overheating. The board has reverse-voltage protection.


  • input voltage: 4.5 V to 24 V
  • typical continuous output current: 7 A (Actual continuous output current depends on thermal dissipation. See Output Current section below for details)
  • output voltage selectable as 5 V or 3.3 V
  • 700 kHz switching frequency
  • 45 mA typical no-load quiescent current (300 μA typical quiescent current with EN=0 V)
  • integrated over-current shutoff
  • size: 43 × 12 × 8 mm
  • weight:6 g


The buck regulator has five connections: 3.3 V select (3V3 SEL), enable (EN), input voltage (VIN), ground (GND), and output voltage (VOUT).

The EN pin can be driven low (under 0.3 V) to turn off the output and put the board into a low-power state that typically draws 150 μA. The board has a 100kΩ pull-up resistor between EN and VIN. The EN pin can be driven high (above 2 V) to enable the board, or it can be connected to VIN or left disconnected if you want to leave the board permanently enabled.

The input voltage, VIN, should be between 4.5 and 24 V. You should ensure that noise on your input does not exceed the 24 V maximum. When power is applied, the input voltage rise time must not be more than a few milliseconds; otherwise, the regulator can latch in an error state that disables its output.

The output voltage, VOUT, is determined by the 3V3 SEL jumper state. If the jumper is disconnected, the output voltage is 5 V. With the jumper connected, the output voltage is 3.3 V. An input voltage lower than the output voltage will not damage the board, but will cause a lower-than-selected output voltage, so we recommend you avoid powering the board with an input voltage below the selected output voltage.

Warning: Do not change the 3V3 SEL jumper while the regulator is powered. Doing so can cause the regulator to shut off until power is cycled.

Output Current

The regulator’s over-current protection limits the output current of the board to 4.5 A. However, over-temperature protection will typically kick in at lower output currents. Therefore, the maximum achievable output current of the board depends on many factors, including the ambient temperature, air flow, heat sinking, and the input voltage. In our tests at room temperature, a continuous output current of 3.5 A was available across the entire input voltage range. These continuous current characteristics are limited by thermal dissipation; the regulator can output higher currents for several seconds or even tens of seconds, depending on how low the current is during the off-peak periods. Higher continuous output current can be achieved by reducing the input voltage or by cooling the board by adding a heat sink or a fan.

During normal operation, this product can get hot enough to burn you. Take care when handling this product or other components connected to it.

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