ADP172 Analog Devices, Inc., ADP172 Datasheet - Page 15

• Manufacturer Part Number: ADP172
• Description: 300 Ma, Low Quiescent Current, Cmos Linear Regulator
• Manufacturer: Analog Devices, Inc.

140
120
100
140
120
100
140
120
100
80
60
40
20
80
60
40
20
80
60
40
20
0
0
0
0.3
0.3
0.3
0.5
0.5
0.5
Figure 31. 100 mm
Figure 33. 500 mm
Figure 32. 0 mm
I
LOAD
0.7
0.7
0.7
= 300mA
I
LOAD
0.9
0.9
0.9
= 300mA
1.1
1.1
1.1
2
I
V
V
V
T
LOAD
T
T
2
of PCB Copper, T
2
J
IN
J
IN
J
IN
of PCB Copper, T
of PCB Copper, T
1.3
1.3
1.3
MAX
MAX
MAX
– V
– V
– V
I
= 300mA
LOAD
OUT
OUT
OUT
1.5
1.5
1.5
(V)
(V)
(V)
I
= 100mA
LOAD
1.7
1.7
1.7
I
LOAD
I
I
LOAD
LOAD
= 200mA
I
I
I
LOAD
LOAD
LOAD
A
1.9
1.9
1.9
I
I
A
A
= 25°C
LOAD
LOAD
= 25°C
I
= 50°C
I
= 100mA
LOAD
LOAD
I
= 50mA
= 100mA
LOAD
I
LOAD
I
= 50mA
= 10mA
= 10mA
LOAD
2.1
2.1
2.1
= 1mA
= 1mA
= 50mA
= 200mA
= 200mA
= 10mA
= 1mA
2.3
2.3
2.3
2.5
2.5
2.5
Rev. A | Page 15 of 20
In cases where board temperature is known, use the thermal
characterization parameter, Ψ
perature rise (see Figure 36). Maximum junction temperature
(T
dissipation (P
The typical value of Ψ
J
) is calculated from the board temperature (T
T
J
140
120
100
140
120
100
140
120
100
80
60
40
20
80
60
40
20
80
60
40
20
= T
0
0
0
0.3
0.3
0.3
I
LOAD
B
+ (P
0.5
0.5
0.5
Figure 34. 100 mm
D
I
LOAD
Figure 35. 0 mm
) using the following formula:
= 300mA
D
0.7
0.7
0.7
× Ψ
= 10mA
I
LOAD
JB
I
0.9
0.9
0.9
JB
LOAD
is 58°C/W for the 4-Ball WLCSP package.
I
)
= 300mA
LOAD
Figure 36. T
= 300mA
1.1
1.1
1.1
= 50mA
2
V
V
V
T
T
T
2
of PCB Copper, T
I
J
IN
J
IN
J
IN
JB
LOAD
of PCB Copper, T
1.3
1.3
1.3
MAX
MAX
MAX
, to estimate the junction tem-
– V
– V
– V
I
LOAD
I
OUT
LOAD
OUT
OUT
A
I
= 100mA
LOAD
1.5
1.5
1.5
= 85°C
= 100mA
(V)
(V)
(V)
= 200mA
= 200mA
1.7
1.7
1.7
I
LOAD
A
1.9
1.9
1.9
A
= 50°C
= 50°C
I
= 100mA
I
LOAD
LOAD
I
I
I
I
LOAD
I
LOAD
LOAD
LOAD
LOAD
I
2.1
2.1
2.1
LOAD
B
) and power
= 50mA
= 200mA
= 10mA
= 50mA
= 10mA
= 1mA
= 1mA
ADP172
2.3
2.3
= 1mA
2.3
2.5
2.5
2.5
(5)