Datasheet

ADP1878/ADP1879 Data Sheet
Rev. B | Page 12 of 40
Figure 34. Frequency vs. Load Current, 1.0 MHz, V
OUT
= 5 V
Figure 35. UVLO vs. Temperature
Figure 36. Maximum Duty Cycle vs. Frequency
Figure 37. Maximum Duty Cycle vs. High Voltage Input (V
IN
)
Figure 38. Minimum Off Time vs. Temperature
Figure 39. Minimum Off Time vs. V
REG
(Low Input Voltage)
1000
1450
1400
1350
1300
1250
1200
1150
1100
1050
0 8000800 1600 2400 3200 4000 4800 5600 6400 7200
FREQUENCY (kHz)
LOAD CURRENT (mA)
V
IN
= 16.5V
V
IN
= 13V +125°C
+25°C
–40°C
09441-034
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)
09441-035
55
60
65
70
75
80
85
90
95
300 400 500 600 700 800 900 1000
MAXIMUM DUTY CYCLE (%)
FREQUENCY (kHz)
+125°C
+25°C
–40°C
09441-036
62
64
66
68
70
72
74
76
78
80
82
5.5 6.7 7.9 9.1 10.3 11.5 12.7 13.9 15.1 16.3
MAXIMUM DUTY CYCLE (%)
V
IN
(V)
+125°C
+25°C
–40°C
09441-037
180
680
630
580
530
480
430
380
330
280
230
–40 120100806040200–20
MINiMUM OFF TIME (ns)
TEMPERATURE (°C)
V
REG
= 2.7V
V
REG
= 5.5V
V
REG
= 3.6V
09441-038
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
REG
(V)
+125°C
+25°C
–40°C
09441-039