Datasheet

EVAL-ADP1754/ADP1755
Rev. 0 | Page 9 of 12
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
07740-030
Figure 15. 500 mm
2
of PCB Copper, T
A
= 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 = 100mA
LOAD = 200mA
LOAD = 400mA
LOAD =
800mA
LOAD = 1.2A
07740-031
Figure 16. 0 mm
2
of PCB Copper, T
A
= 50°C, LFCSP
In cases where the board temperature is known, the thermal
characterization parameter, Ψ
JB
, can be used to estimate the
junction temperature rise. Maximum junction temperature (T
J
)
is calculated from the board temperature (T
B
) and power
dissipation (P
D
) using the following formula:
T
J
= T
B
+ (P
D
× Ψ
JB
) (4)
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
07740-032
Figure 17. 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
07740-033
Figure 18. 500 mm
2
of PCB Copper, T
B
= 50°C, LFCSP