Datasheet

-40 -20 0 20 40 60 80
AMBIENT TEMPERATURE (
o
C)
2.8
2.9
3
3.1
3.2
3.3
3.4
SWITCH CURRENT LIMIT (A)
V
OUT
= 3.3V
V
OUT
= 5V
-40 -20 0 20 40 60 80
AMBIENT TEMPERATURE (
o
C)
1.4
1.45
1.5
1.55
1.6
1.65
1.7
SWITCH CURRENT LIMIT (A)
V
OUT
= 3.3V
V
OUT
= 5V
5 7 9 11 13 15 17 19
INPUT VOLTAGE (V)
1
1.2
1.4
1.6
1.8
2
2.2
2.4
SWITCH
CURREN
T LIMIT (A)
V
OUT
= 3.3V
V
OUT
= 5V
5 9 13 17
INPUT VOLTAGE (V)
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8
4
SWITCH
CURREN
T LIMIT (A)
7 11 15 19
V
OUT
= 3.3V
V
OUT
= 5V
0 0.5 1 1.5 2 2.5
LOAD CURRENT (A)
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
V
IN
= 18V
0 0.5 1 1.5 2 2.5
LOAD CURRENT (A)
0
10
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
V
IN
= 18V
LM2717-ADJ
www.ti.com SNVS407C –DECEMBER 2005–REVISED MARCH 2013
Typical Performance Characteristics (continued)
Buck 2 Efficiency vs. Load Current(V
OUT
= 15V) Buck 2 Efficiency vs. Load Current(V
OUT
= 5V)
Figure 8. Figure 9.
Buck 1 Switch Current Limit vs. Input Voltage Buck 2 Switch Current Limit vs. Input Voltage
Figure 10. Figure 11.
Buck 1 Switch Current Limit vs. Temperature(V
IN
= 12V) Buck 2 Switch Current Limit vs. Temperature(V
IN
= 12V)
Figure 12. Figure 13.
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