Data Sheet

2/8/2018 Pololu - 2.5-9V Fine-Adjust Step-Up/Step-Down Voltage Regulator S9V11MA
https://www.pololu.com/product/2869 3/6
Output voltage settings for the 2.5-9V Fine-Adjust
Step-Up/Step-Down Voltage Regulator S9V11MACMA
and S9V11MA.
Please note that the output voltage can be set below 2.5 V at the low end of the potentiometer’s range
and above 9 V at the high end. While this is not likely to damage the regulator, it might not work
reliably or its output could become unstable when the output voltage is not within the recommended
2.5 V to 9 V range.
The output voltage can be up to 3% higher than normal when there is little or no load on the regulator.
The output voltage can also drop depending on the current draw, especially when the regulator is
boosting a lower voltage to a higher one (stepping up), although it should remain within 5% of the set
voltage.
Typical efficiency and output current
The efficiency of a voltage regulator, defined as (Power out)/(Power in), is an important measure of its
performance, especially when battery life or heat are concerns. As shown in the graphs below, this
family of switching regulators typically has an efficiency of 85% to 95%. A power-saving feature
maintains these high efficiencies even when the regulator current is very low.