Datasheet

ADP8866 Data Sheet
Rev. A | Page 10 of 52
100
90
80
70
60
50
40
30
20
10
0
2.5 3.0 3.5 4.0 4.5
5.0 5.5
V
IN
(V)
EFFICIENCY (%)
09478-022
V
F
= 3.4V
V
F
= 4.0V
Figure 22. Typical Efficiency (Each LED Set to 25 mA)
09478-024
1µs/DIV
1
2
3
V
IN
(AC-COUPLED) 50mV/DIV
V
OUT
(AC-COUPLED) 50mV/DIV
I
IN
(AC-COUPLED) 10mA/DIV
T
C
IN
= 1µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 3.6V
I
OUT
= 120mA
Figure 23. Typical Operating Waveforms, G = 1×
09478-025
1µs/DIV
1
2
3
V
IN
(AC-COUPLED) 50mV/DIV
V
OUT
(AC-COUPLED) 50mV/DIV
I
IN
(AC-COUPLED) 10mA/DIV
T
C
IN
= 1µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 3.0V
I
OUT
= 120mA
Figure 24. Typical Operating Waveforms, G = 1.5×
09478-026
1µs/DIV
1
2
3
V
IN
(AC-COUPLED) 50mV/DIV
V
OUT
(AC-COUPLED) 50mV/DIV
I
IN
(AC-COUPLED) 10mA/DIV
T
C
IN
= 1µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 2.5V
I
OUT
= 120mA
Figure 25. Typical Operating Waveforms, G = 2×
09478-027
100µs/DIV
2
4
I
IN
(10mA/DIV)
V
OUT
(1V/DIV)
I
OUT
(10mA/DIV)
T
3
C
IN
= 10µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 3.6V
Figure 26. Typical Startup Waveforms