Ensure that you have the instruments to perform measurements.
The following instruments are required:
- Power source. Connect to a DC power supply with 3–5.5 V voltage range.
- Electronic load to simulate different load scenarios in the system.
- Oscilloscope to capture waveforms of the input and output voltages.
For higher precision results, we recommend the use of a Source Measure Unit (SMU) on both input and output. The Power Profiler Kit II can be used as an affordable alternative to an SMU because it captures traces of both voltage and current changes.
Prepare the test bench as shown in the following figure.
Figure 1. Test bench
For all measurements, VIN is set to 3.8 V. BUCK0 is used to demonstrate the measurements. For other outputs, limits should be adjusted accordingly.