Datasheet

Data Sheet ADP170/ADP171
Rev. C | Page 15 of 20
140
120
100
80
60
40
20
0
07716-030
JUNCTION TEMPERATURE (°C)
V
IN
– V
OUT
(V)
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 25mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 300mA
T
J
MAX
0.5
1.0 1.5
2.0
2.5 3.0
Figure 35. 0 mm
2
of PCB Copper, T
A
= 25°C
140
120
100
80
60
40
20
0
07716-031
JUNCTION TEMPERATURE (°C)
V
OUT
– V
IN
(V)
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 25mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 300mA
T
J
MAX
0.5 1.0 1.5
2.0 2.5 3.0
Figure 36. 500 mm
2
of PCB Copper, T
A
= 50°C
140
120
100
80
60
40
20
0
07716-032
JUNCTION TEMPERATURE (°C)
V
OUT
– V
IN
(V)
I
LOAD
= 1mA
I
LOAD
= 25mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 10mA
0.5
1.0 1.5 2.0 2.5 3.0
Figure 37. 100 mm
2
of PCB Copper, T
A
= 50°C
140
120
100
80
60
40
20
0
07716-033
JUNCTION TEMPERATURE (°C)
V
OUT
– V
IN
(V)
I
LOAD
= 1mA
I
LOAD
= 25mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 300mA
T
J
MAX
I
LOAD
= 10mA
0.5
1.0 1.5 2.0 2.5 3.0
Figure 38. 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 39). 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 42.8°C/W for the 5-lead TSOT package.
140
120
100
80
60
40
20
0
07716-034
JUNCTION TEMPERATURE (°C)
V
IN
– V
OUT
(V)
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 50mA
I
LOAD
= 100mA
I
LOAD
= 150mA
I
LOAD
= 250mA
I
LOAD
= 300mA
T
J
MAX
0.4
0.8 1.2 1.6 2.0 2.4
2.8
Figure 39. TSOT, T
A
= 85°C