Analog Devices UG-188, User Manual

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Evaluation Board User Guide UG-188
Rev. 0 | Page 5 of 8
TYPICAL PERFORMANCE CHARACTERISTICS
0
10
20
30
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
E
F
F
IC
IE
NCY
(
%
)
OUTPUT CURRENT (A)
V
OUT
= 1.0V
V
OUT
= 1.2V
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
09
31
4-
0
04
Figure 4. ADP2119 Efficiency, V
IN
= 5 V, FPWM
0
10
20
30
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
E
F
F
IC
IE
NCY
(
%
)
OUTPUT CURRENT (A)
V
OUT
= 1.0V
V
OUT
= 1.2V
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 2.5V
09
31
4-
0
05
Figure 5. ADP2119 Efficiency, V
IN
= 3.3 V, FPWM
CH1 5.00mV
B
W
CH2 5.00V
CH4 1.00A
Ω
M1.00µs A CH2 4.30V
1
2
4
T –40.0000ns
I
L
SW
V
OUT
(AC)
0
93
14-
00
6
Figure 6. Continuous Conduction Mode (ADP2120)
CH1 20.0mV
B
W
CH2 5.00V
CH4 500mA
Ω
M4.00µs A CH4 820mA
1
2
4
T –40.0000ns
I
L
SW
V
OUT
(AC)
0
93
14-
007
Figure 7. PFM Mode (ADP2120)
CH1 500mV
B
W
CH3 5.00V
CH2 5.00V
CH4 2.00A
Ω
M400µs A CH3 3.60V
3
2
1
4
T 30.40%
EN
V
OUT
PGOOD
I
L
09
31
4
-00
8
Figure 8. Soft Start (ADP2119, V
IN
= 5 V, V
OUT
= 1.2 V)
CH1 50.0mV
B
W
CH4 1.00A Ω
M200µs A CH3 880mA
1
4
T 596.000µs
I
O
V
OUT
(AC)
0
93
14-
00
9
Figure 9. Load Transient (ADP2119, FPWM, V
IN
= 5 V, V
OUT
= 1.2 V)