Voltage Source: Use an input voltage source capable of supplying 0 V to 40 V and 12 A.

Multimeters:

• Voltmeter 1: Input voltage at VIN+ to VIN–. Set voltmeter to an input impedance of 100 MΩ.
• Voltmeter 2: Output voltage at VOUT to GND. Set voltmeter to an input impedance of 100 MΩ.
• Ammeter 1: Input current. Set ammeter to 1-second aperture time.
• Ammeter 2: Output current. Set ammeter to 1-second aperture time.

Electronic Load: The load must be an electronic constant-resistance (CR) or constant-current (CC) mode load capable of 0 Adc to 10 Adc at 12 V. For a no-load input current measurement, disconnect the electronic load as it may draw a small residual current.

Oscilloscope: With the scope set to 20-MHz bandwidth and AC coupling, measure the output voltage ripple directly across an output capacitor with a short ground lead normally provided with the scope probe. Place the oscilloscope probe tip on the positive terminal of the output capacitor, holding the ground barrel of the probe through the ground lead to the negative terminal of the capacitor. TI does not recommend using a long-leaded ground connection because this can induce additional noise given a large ground loop. To measure other waveforms, adjust the oscilloscope as needed.

Safety: Always use caution when touching any circuits that may be live or energized.