Datasheet

ADP1872/ADP1873 Data Sheet
Rev. B | Page 12 of 40
2.649
2.658
2.657
2.656
2.655
2.654
2.653
2.652
2.651
2.650
–40 120100806040200–20
UVLO (V)
TEMPERATURE (°C)
08297-034
Figure 34. UVLO vs. Temperature
40
45
50
55
60
65
70
75
80
85
90
95
100
300 400 500 600 700 800 900 1000
MAXIMUM DUTY CYCLE (%)
FREQUENCY (kHz)
V
DD
= 2.7V
V
DD
= 5.5V
V
DD
= 3.6V
+125°C
+25°C
–40°C
08297-035
Figure 35. Maximum Duty Cycle vs. Frequency
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
3.6 4.8 6.0 7.2 8.4 9.6 10.8 12.0 13.2 14.4 15.6
MAXIMUM DUTY CYCLE (%)
V
IN
(V)
V
DD
= 5.5V
V
DD
= 3.6V +125°C
+25°C
–40°C
08297-036
Figure 36. Maximum Duty Cycle vs. High Voltage Input (V
IN
)
180
680
630
580
530
480
430
380
330
280
230
–40 120100806040200–20
MINIMUM OFF-TIME (ns)
TEMPERATURE (°C)
V
DD
= 2.7V
V
DD
= 5.5V
V
DD
= 3.6V
08297-037
Figure 37. Minimum Off-Time vs. Temperature
180
680
630
580
530
480
430
380
330
280
230
2.7 5.55.14.74.33.93.53.1
MINIMUM OFF-TIME (ns)
V
DD
(V)
+125°C
+25°C
–40°C
08297-038
Figure 38. Minimum Off-Time vs. V
DD
(Low Input Voltage)
80
800
720
640
560
480
400
320
240
160
300 400 500 600 700 800 900 1000
RECTIFIER DROP (mV)
FREQUENCY (kHz)
V
DD
= 2.7V
V
DD
= 5.5V
V
DD
= 3.6V
+125°C
+25°C
–40°C
08297-039
Figure 39. Internal Rectifier Drop vs. Frequency