You can use a multimeter with the TPS65131 breakout to measure the output voltages. In the example below, you'll supply 5V to VIN and then use the multimeter to measure the positive voltage output and the negative voltage output. The outputs are adjusted with the onboard trim pots.
Set your multimeter to the DC voltage mode. It is labeled with a V and two lines, one dashed and one solid. For information on using a multimeter, check out this guide.
Wire up the breakout to a 5V power supply and your multimeter as shown below:
- Breakout Vin to 5V power supply positive (red wire)
- Breakout GND to power supply negative (black wire)
- Breakout V+ to multimeter volts (red wire)
- Breakout GND to multimeter COM (black wire)
After wiring and powering everything up, adjust the voltage output on the V+ pin with the positive voltage trim pot on the left side of the board. As you turn the pot clockwise, you'll see the voltage increase. As you turn the pot counter-clockwise, you'll see the voltage decrease. You can tune the voltages from about +6~+15VDC.
Measure Negative Voltage
Wire up the breakout to a 5V power supply and your multimeter as shown below:
- Breakout Vin to 5V power supply positive (red wire)
- Breakout GND to power supply negative (black wire)
- Breakout V- to multimeter volts (red wire)
- Breakout GND to multimeter COM (black wire)
After wiring and powering everything up, adjust the voltage output on the V- pin with the negative voltage trim pot on the right side of the board. As you turn the pot clockwise, you'll see the negative voltage increase. As you turn the pot counter-clockwise, you'll see the negative voltage decrease. You can tune the voltages from about -6~15VDC.
Page last edited March 17, 2025
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