Rev 21 Jan 2014 15:09 | Page 16

internal frequency set by the RT pin.

When the SYNC/MODE pin is configured as the input, the ADP5051/ADP5053 can be synchronized to

an external clock applied to the SYNC/MODE pin. Note that the internal clock set by the RT pin must

be programmed close to the external clock.

Measuring Load Regulation of the Buck

Test the load regulation by increasing the load at the output and looking at the change in output

voltage. The input voltage must be held constant during this measurement. To minimize voltage drop,

use short low resistance wires, especially for loads approaching maximum current. Typical buck load

regulation is shown in Figure 16.

Figure 16. Buck Load Regulation

Measuring Line Regulation

To measure line regulation, vary the input voltage and examine the change in the output voltage.

Typical buck line regulation is shown in Figure 17.