Datasheet

Data Sheet ADP8861
Rev. B | Page 9 of 40
5.5
4.5
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
–10–40 20 50 80 110
V
OUT
(V)
JUNCTION TEMPERATURE (°C)
V
IN
= 3V
GAIN = 2×
I
OUT
= 10mA
08391-113
Figure 17. Typical Regulated Output Voltage (V
OUT(REG)
)
6.0
5.8
5.6
5.4
5.2
–10–40 20 50 80 110
V
OUT
(V)
JUNCTION TEMPERATURE (°C)
OVP THRESHOLD
OVP RECOVERY
08391-114
Figure 18. Typical Overvoltage Protection (OVP) Threshold
90
80
70
60
50
40
30
20
10
0
450
400
350
300
250
200
150
100
50
0
2.5 5.55.04.54.03.53.0
EFFICIENCY (%)
I
IN
(mA)
V
IN
(V)
I
OUT
= 140mA, Vf = 3.1V
I
OUT
= 210mA, Vf = 3.2V
08391-115
Figure 19. Typical Efficiency (Low Vf Diode)
100
90
80
70
60
50
40
30
20
10
0
450
400
350
300
250
200
150
100
50
0
2.5 5.55.04.54.03.53.0
EFFICIENCY (%)
I
IN
(mA)
V
IN
(V)
I
OUT
= 140mA, Vf = 3.85V
I
OUT
= 210mA, Vf = 4.25V
08391-116
Figure 20. Typical Efficiency (High Vf Diode)
1
3
T
500ns/DIV
V
IN
(AC-COUPLED) 50mV/DIV
V
OUT
(AC-COUPLED) 50mV/DIV
I
IN
(AC-COUPLED) 10mA/DIV
C
IN
= 1µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 3.6V
I
OUT
= 120mA
2
08391-117
Figure 21. Typical Operating Waveforms, G = 1×
1
2
3
T
500ns/DIV
V
OUT
(AC-COUPLED) 50mV/DIV
V
IN
(AC-COUPLED) 50mV/DIV
I
IN
(AC-COUPLED) 10mA/DIV
C
IN
= 1µF, C
OUT
= 1µF, C1 = 1µF, C2 = 1µF
V
IN
= 3.0V
I
OUT
= 120mA
08391-118
Figure 22. Typical Operating Waveforms, G = 1.5×