PTN78000A
www.ti.com
SLTS246A – APRIL 2005 – REVISED MAY 2005
TYPICAL CHARACTERISTICS (12-V INPUT)
(1) (2)
EFFICIENCY
vs
OUTPUT CURRENT
V
O
- Output Voltage Ripple - mV
PP
90
85
80
100
V
O
= -12 V
OUTPUT VOLTAGE RIPPLE
vs
OUTPUT CURRENT
2
POWER DISSIPATION
vs
OUTPUT CURRENT
P
D
- Power Dissipation - W
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
0.5
V
O
= -5 V
V
O
= -3 V
1
1.5
V
O
= -15 V
V
O
= -12 V
Efficiency - %
75
70
65
60
55
50
45
0
0.5
1
1.5
I
O
- Output Current - A
V
O
= -15 V
V
O
= -5 V
V
O
= -3 V
V
O
= -12 V
90
80
70
60
50
40
30
20
10
0
0
V
O
= -15 V
V
O
= -5 V
V
O
= -3 V
0.5
1
1.5
I
O
- Output Current - A
I
O
- Output Current - A
Figure 7.
TEMPERATURE DERATING
vs
OUTPUT CURRENT
90
90
Figure 8.
TEMPERATURE DERATING
vs
OUTPUT CURRENT
90
Figure 9.
TEMPERATURE DERATING
vs
OUTPUT CURRENT
Ambient Temperature -
o
C
80
70
60
50
40
30
20
0.75
V
O
= -15 V
200 LFM
100 LFM
Nat conv
Ambient Temperature -
o
C
80
200 LFM
Ambient Temperature -
o
C
80
70
60
70
100 LFM
200 LFM
100 LFM
Nat conv
60
50
40
30
20
0
0.5
Nat conv
50
40
30
V
O
= -12 V
V
O
= -5 V and -3 V
1
1.5
20
0
0.25
0.5
I
O
- Output Current - A
0
0.1
0.2
0.3
0.4
0.5
0.6
I
O
- Output Current - A
I
O
- Output Current - A
Figure 10.
(1)
(2)
Figure 11.
Figure 12.
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
and
6
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