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- Verify the 5V output rail turns on (buck functionality)
- Verify the internal 3.3V rail turns on (LDO functionality)
- Slowly increase voltage (with low current limit, 100mA max) on buck input
- Check for excessive current/power draw (ensuring no output load)
- Optionally, measure potential when EN pin activates buck IC
- Varies due to hysterisis, but ~5.2V
- Probe the output net for voltage stability with DMM
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E-load
- Perform basic load test on buck converter: use an e-load to fully saturate the buck and verify you get the output current expected (stepping the load up to 4A)saturate a 5V line to 0.8A
Oscilloscope
- Load transient testing: Step the e-load and view the transient response from buck converter output.
- Battery inrush test: simulate hot-plugging a battery on the input terminal and view transient voltage spike/oscillations.
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