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TYPICAL CHARACTERISTICS
(1) (2)
Characteristic Data (V
I
= 12 V)
2
4
6
8
10
12
14
I
O
-OutputCurrent- A
V
O
=5V
V
O
=3.3V
V
O
=1.8V
V
O
=1.2V
V
O
=0.8V
0 10 20 30 40 50
0
-PowerDissipation-W
P
D
50
60
70
80
90
100
Efficiency-%
I -OutputCurrent- A
O
0 10 20 30 40 50
V
O
=5V
V
O
=3.3V
V
O
=1.8V
V
O
=1.2V
V
O
=0.8V
0
40
20
10 20 30 40 50
30
70
50
60
90
80
I
O
– Output Current – A
T
A
– Ambient Temperature – °C
V
O
= 5 V
Natural
Convection
100 LFM
200 LFM
400 LFM
20
30
40
50
60
70
80
90
400LFM
200LFM
NatConv
V
O
=1.2V
I
O
-OutputCurrent- A
T
A
- AmbientTemperature- C
o
0 10 20 30 40 50
100LFM
PTH12040W
SLTS237G – DECEMBER 2004 – REVISED MARCH 2009 ...............................................................................................................................................
www.ti.com
EFFICIENCY POWER DISSIPATION TEMPERATURE DERATING
vs vs vs
LOAD CURRENT LOAD CURRENT OUTPUT CURRENT
Figure 1. Figure 2. Figure 3.
TEMPERATURE DERATING TEMPERATURE DERATING
vs vs
OUTPUT CURRENT OUTPUT CURRENT
Figure 4. Figure 5.
(1) The electrical characteristic data has been developed from actual products tested at 25 ° C. This data is considered typical for the
converter. Applies to Figure 1 and Figure 2 .
(2) The temperature derating curves represent the conditions at which internal components are at or below the manufacturer ' s maximum
operating temperatures. Derating limits apply to modules soldered directly to a 4-inch x 4-inch, double-sided PCB with 1-oz. copper. For
surface mount packages (AS and AZ suffix), multiple vias (plated through holes) are required to add thermal paths around the power
pins. Please refer to the mechanical specification for more information. Applies to Figure 3 , Figure 4 , and Figure 5 .
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