PTN78000A
www.ti.com
SLTS246A – APRIL 2005 – REVISED MAY 2005
TYPICAL CHARACTERISTICS (24-V INPUT)
(1) (2)
EFFICIENCY
vs
OUTPUT CURRENT
V
O
- Output Voltage Ripple - mV
PP
85
80
75
V
O
= -5 V
70
60
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
0.3
0.6
0.9
1.2
1.5
0
POWER DISSIPATION
vs
OUTPUT CURRENT
P
D
- Power Dissipation - W
50
40
30
20
10
0
V
O
= -5 V
V
O
= -5 V
Efficiency - %
70
65
60
55
50
45
0
0.3
0.6
0.9
1.2
1.5
I
O
- Output Current - A
V
O
= -3 V
V
O
= -3 V
V
O
= -3 V
0.3
0.6
0.9
1.2
1.5
I
O
- Output Current - A
I
O
- Output Current - A
Figure 13.
Figure 14.
TEMPERATURE DERATING
vs
OUTPUT CURRENT
90
Figure 15.
Ambient Temperature -
o
C
80
70
60
50
40
V
O
= -5V and -3 V
30
20
0
0.5
1
I
O
- Output Current - A
1.5
200 LFM
100 LFM
Nat conv
Figure 16.
(1)
(2)
The electrical characteristic data has been developed from actual products tested at 25°C. This data is considered typical for the
converter. Applies to
and
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 100-mm x 100-mm, double-sided PCB with 2 oz. copper.
Applies to
7
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