Voltage Source: Use a power supply capable of supplying 0V to 2.2V and 4A. If necessary, use an additional power supply capable of supplying 0V to 5.0V and 500mA for the load transient circuit.

Multimeters:

• Voltmeter 1: Input voltage at V_IN.
• Voltmeter 2: Output voltage at V_OUT to GND.
• Ammeter 1: Input current. Set the ammeter to 1-second aperture time.
• Ammeter 2: Output current. Set the 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 0A to 4A.

Oscilloscope: With the scope set to 20MHz 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 can be live or energized.