Datasheet

ADP1754/ADP1755 Data Sheet
Rev. F | Page 16 of 20
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
07722-032
Figure 36. 6400 mm
2
of PCB Copper, T
A
= 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
07722-033
Figure 37. 500 mm
2
of PCB Copper, T
A
= 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
07722-034
Figure 38. 0 mm
2
of PCB Copper, T
A
= 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
07722-035
Figure 39. 6400 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
07722-036
Figure 40. 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
07722-037
Figure 41. 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
) (7)