Datasheet

Data Sheet ADP1754/ADP1755
Rev. F | Page 17 of 20
Figure 42 through Figure 45 show junction temperature calcula-
tions for different board temperatures, load currents, V
IN
to
V
OUT
differentials, and areas of PCB copper.
140
120
100
80
60
40
20
0
0.25 0.75 1.25 1.75 2.25 2.75
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE,
T
J
(°C)
MAX JUNCTION
TEMPERATURE
LOAD = 10mA
LOAD = 100mA
LOAD = 200mA
LOAD = 400mA
LOAD = 800mA
LOAD = 1.2A
07722-038
Figure 42. 500 mm
2
of PCB Copper, T
B
= 25°C, LFCSP
140
120
100
80
60
40
20
0
0.25 0.75 1.25 1.75 2.25 2.75
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE,
T
J
(°C)
MAX JUNCTION
TEMPERATURE
LOAD = 10mA
LOAD = 100mA
LOAD = 200mA
LOAD = 400mA
LOAD = 800mA
LOAD = 1.2A
07722-039
Figure 43. 500 mm
2
of PCB Copper, T
B
= 50°C, LFCSP
140
120
100
80
60
40
20
0
0.25 0.75 1.25 1.75 2.25 2.75
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE,
T
J
(°C)
MAX JUNCTION
TEMPERATURE
LOAD = 10mA
LOAD = 200mA
LOAD = 400mA
LOAD = 800mA
LOAD = 1.2A
LOAD = 100mA
07722-040
Figure 44. 1000 mm
2
of PCB Copper, T
B
= 25°C, LFCSP
140
120
100
80
60
40
20
0
0.25 0.75 1.25 1.75 2.25 2.75
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE,
T
J
(°C)
MAX JUNCTION
TEMPERATURE
LOAD = 10mA
LOAD = 200mA
LOAD = 400mA
LOAD = 800mA
LOAD = 1.2A
LOAD = 100mA
07722-041
Figure 45. 1000 mm
2
of PCB Copper, T
B
= 50°C, LFCSP