Datasheet

Data Sheet ADP172
Rev. D | Page 15 of 20
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-031
Figure 31. 100 mm
2
of PCB Copper, T
A
= 25°C
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-032
Figure 32. 0 mm
2
of PCB Copper, T
A
= 25°C
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-033
Figure 33. 500 mm
2
of PCB Copper, T
A
= 50°C
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-034
Figure 34. 100 mm
2
of PCB Copper, T
A
= 50°C
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-035
Figure 35. 0 mm
2
of PCB Copper, T
A
= 50°C
In cases where board temperature is known, use the thermal
characterization parameter, Ψ
JB
, to estimate the junction tem-
perature rise (see Figure 36). 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
) (5)
The typical value of Ψ
JB
is 58°C/W for the 4-Ball WLCSP package.
0
20
40
60
80
100
120
140
0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5
V
IN
– V
OUT
(V)
JUNCTION TEMPERATURE, T
J
(°C)
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 1mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 200mA
I
LOAD
= 10mA
06111-036
Figure 36. T
A
= 85°C