Added Figure 7 And Figure 9; Renumbered Sequentially; Changes To Measuring Load Regulation Of Buck Regulator Section, Figure 8, Measuring Line Regulation Of Buck Regulator Section, And Figure 10 - Analog Devices ADP5034 User Manual

Evaluation Board User Guide
Measuring Load Regulation of the Buck Regulator
Test the load regulation by increasing the load at the output and
examining 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. The buck regulator load regulation plots for
V = 3.3 V and V = 1.8 V are shown in Figure 7 and
OUT2 OUT2
Figure 8, respectively.
3.277
V = 3.8V
IN
V = 4.3V
IN
V = 5.5V
IN
3.276
3.275
3.274
3.273
3.272
3.271
0 200 400
Figure 7. Buck Load Regulation, V
1.7985
V = 2.3V
IN
V = 3.6V
IN
V = 5.5V
IN
1.7980
1.7975
1.7970
1.7965
1.7960
1.7955
1.7950
0 100 200 300 400
Figure 8. Buck Load Regulation, V
600 800 1000 1200
I (mA)
LOAD
= 3.3 V
OUT2
500 600 700 800 900 1000 1100 1200
I (mA)
LOAD
= 1.8 V
OUT2
Measuring Line Regulation of the Buck Regulator
Test the line regulation by increasing the input voltage and
examining the change in the output voltage. The buck regulator
line regulation plots for V
shown in Figure 9 and Figure 10, respectively.
3.277
NO LOAD
3.276 I
LOAD
I
LOAD
3.275 I
LOAD
3.274
3.273
3.272
3.271
3.270
3.269
3.268
3.267
3.266
3.265
3.8
Figure 9. Buck Regulator Line Regulation, V
1.7990
I
LOAD
I
LOAD
I
1.7985
LOAD
I
LOAD
1.7980
1.7975
1.7970
1.7965
1.7960
1.7955
1.7950
2.0
Figure 10. Buck Regulator Line Regulation, V
Rev. A | Page 5 of 13
= 3.3 V and V
OUT2
= 200mA
= 800mA
= 1200mA
4.3 4.8
V (V)
IN2
= 0mA
= 200mA
= 800mA
= 1200mA
2.5 3.0 3.5 4.0 4.5
V (V)
IN2
UG-439
= 1.8 V are
OUT2
5.3
= 3.3 V
OUT2
5.0 5.5
= 1.8 V
OUT2