Datasheet

TEMPERATURE (
o
C)
-40
-25 -10 5 80 95 110125
20 35
50
65
9.3
9.4
9.5
9.6
9.7
9.8
9.9
10
BOOT PIN CURRENT (mA)
TEMPERATURE (
o
C)
-40
-25 -10 5 80 95 110125
20 35
50
65
BOOT PIN CURRENT (mA)
5.9
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
0.05 0.25 0.45 0.65 0.85
FREQUENCY (MHz)
1.05
V
CC
OPERATING CURRENT
PLUS BOOT CURRENT (
mA)
0
6
13
19
25
EFFICIENCY (%)
20
30
40
50
60
70
80
90
100
V
IN
= 12V
V
IN
= 5V
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
OUTPUT CURRENT (A)
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
OUTPUT CURRENT (A)
20
30
40
50
60
70
80
90
100
EFFICIENCY (%)
V
IN
= 3.3V
V
IN
= 12V
V
IN
= 5V
EFFICIENCY (%)
20
30
40
50
60
70
80
90
100
V
IN
= 3.3V
V
IN
= 12V
V
IN
= 5V
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
OUTPUT CURRENT (A)
LM2743
www.ti.com SNVS276G –APRIL 2004–REVISED MARCH 2013
Typical Performance Characteristics
Efficiency (V
OUT
= 1.2V) Efficiency (V
OUT
= 2.5V)
V
CC
= 3.3V, f
SW
= 300 kHz V
CC
= 3.3V, f
SW
= 300 kHz
Figure 3. Figure 4.
V
CC
Operating Current plus BOOT Current
vs
Efficiency (V
OUT
= 3.3V) Frequency
V
CC
= 5V, f
SW
= 300 kHz FDS6898A FET (T
A
= 25°C)
Figure 5. Figure 6.
BOOT Pin Current BOOT Pin Current
vs vs
Temperature for BOOT Voltage = 3.3V Temperature for BOOT Voltage = 5V
f
SW
= 300 kHz, FDS6898A FET, No-Load f
SW
= 300 kHz, FDS6898A FET, No-Load
Figure 7. Figure 8.
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