MAX15007 Maxim Integrated Products, MAX15007 Datasheet - Page 10

• Manufacturer Part Number: MAX15007
• Description: (MAX15006 / MAX15007) ultra-low quiescent-current linear regulators
• Manufacturer: Maxim Integrated Products

The MAX15006/MAX15007 provide up to 50mA of con-
tinuous output current. The input voltage range extends
to 40V. Package power dissipation limits the amount of
output current available for a given input/output voltage
and ambient temperature. Figure 4 shows the maximum
allowable power dissipation for these devices to keep the
junction temperature below +150°C. Figure 4 assumes
that the exposed metal pad of the MAX15006/MAX15007
is soldered to 1in
Use Figure 4 to determine the allowable package dissi-
pation for a given ambient temperature. Alternately, use
the following formulas to calculate the allowable pack-
age dissipation. For the TDFN package:
40V, Ultra-Low Quiescent-Current
Linear Regulators in 6-Pin TDFN/8-Pin SO
Figure 4. Calculated Maximum Power Dissipation vs. Ambient
Temperature
10
P
D
=
______________________________________________________________________________________
⎧
⎪
⎨
⎪
⎩
1 9048
1 9048
.
.
Available Output Current Calculation
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
W for T
W
0
−
0
0 0238
Applications Information
.
1.9408W
(6-PIN TDFN)
1.8605W
(8-PIN SO-EP)
2
A
20
of PCB copper.
≤ +
°
W
C
40
70
TEMPERATURE (°C)
x T
°
C
(
60
DERATE
23.3mW/°C
A
–
70
80
°
C for
)
100
DERATE
23.8mW/°C
+
120
70
°
C
140
<
T
A
≤ +
125
°
C
⎫
⎪
⎬
⎪
⎭
For the SO-EP package:
After determining the allowable package dissipation,
calculate the maximum allowable output current, with-
out exceeding the +150°C junction temperature, using
the following formula:
The above equations do not include the negligible
power dissipation from self-heating due to the IC
ground current.
Example 1 (TDFN Package):
T
V
V
Calculate the maximum allowable package dissipation
at the given temperature as follows:
And establish the maximum output current:
Example 2 (TDFN Package):
T
V
V
Calculate the maximum allowable package dissipation
at the given temperature as follows:
P
P
P
D
A
D
A
IN
OUT
IN
OUT
D
= +125°C
= +85°C
=
= 26V
= 14V
=
=
⎧
⎪
⎨
⎪
⎩
1 8605
1 8605
= 3.3V
= 5V
1.9048W
.
.
1.9048W
I
OUT(MAX)
I
W for T
W
OUT(MAX)
−
0 0233
−
.
−
A
0.0238
0.0238
≤ +
°
W
C
=
70
=
x T
°
C
26V 3.3V
(
°
595.8mW
W
V
°
C
W
C
A
IN
–
(
70
−
(
−
125 C
P
85 C
°
D
V
C for
OUT
°
)
°
−
−
+
=
70
70 C
≤
70 C
°
26.2mA
C
°
50mA
°
<
)
)
T
=
=
A
1.5478W
595.8mW
≤ +
125
°
C
⎫
⎪
⎬
⎪
⎭