Datasheet

RB-Pol-117

Pololu 2.5-9.5V Adjustable Boost Regulator

Overview

The Pololu adjustable boost regulator is a very flexible switching regulator (also called a

switched-mode power supply, SMPS, or DC-to-DC converter) that can generate voltages

higher than its input voltage. We offer two adjustable ranges: approximately 2.5 V to

9.5 V and 4 V to 25 V. The output voltage can be set using the trimmer potentiometer in

the upper-right corner of the board. The input voltage range is 1.5 V to 16 V (the input

voltage should be kept below the output voltage). The integrated 2 A switch allows for

output currents high enough to drive small motors, as in our 3pi robot, and allows large

voltage gains, such as obtaining 24 V from two NiMH or NiCd cells.

Note: For high-volume applications, this product can be customized with fixed output

voltages ranging from 2 V to 30 V.

Some example applications include:

• Powering 5 V or 3.3 V systems from lower-voltage batteries.

• Powering 5 V subsystems (e.g. sensors) in lower-voltage (e.g. 3.3 V) systems.

• Achieving consistent actuator operation when powered by fluctuating batteries

• Powering high-brightness LEDs or a large number of LEDs in series

Feature summary:

• Input voltage: 1.5 V to 16 V

• Output adjustable from 2.5 V to 9.5 V or 4 V to 25 V

• 750 khz switching frequency

• 2 A switch (and input) limit

• Integrated over-temperature and over-current shutoff

• Typical efficiency of 80-90% when doubling voltage and with 100-500 ma output

• Small size: 10.7 x 22.4 x 5.8 mm (0.42" x 0.88" x 0.23")

• Weight without header pins: 1.6 g (0.06 oz)

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RB-Pol-117 Pololu 2.5-9.5V Adjustable Boost Regulator Overview The Pololu adjustable boost regulator is a very flexible switching regulator (also called a switched-mode power supply, SMPS, or DC-to-DC converter) that can generate voltages higher than its input voltage. We offer two adjustable ranges: approximately 2.5 V to 9.5 V and 4 V to 25 V. The output voltage can be set using the trimmer potentiometer in the upper-right corner of the board. The input voltage range is 1.
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Using the Boost Regulator Connections The boost regulator has just three connections: the input voltage, ground, and the output voltage. These three connections are labeled on the back side of the PCB, and they are arranged with a 0.1" spacing along the edge of the board for compatibility with standard solderless breadboards and perfboards and connectors that use a 0.1" grid.
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Output voltage settings for the adjustable boost regulators. The absolute limit for the input voltage is double the output set voltage. For example, if the output is set to 6 V, the input must not exceed 12 V. Once the input exceeds the output set point, the output voltage will rise with the input voltage since the input is connected to the output through an inductor and a diode.
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