Datasheet

2V/div
1V/div
5V/div
100 ns/DIV
LG
SW
HG
2V/div
1V/div
5V/div
100 ns/DIV
HG
SW
LG
0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4
1.200
1.201
1.202
1.203
1.204
1.205
1.206
1.207
1.208
1.209
1.210
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
TEMPERATURE (
o
C)
-55
-35 -15 85 105 125
5 25
45
65
FREQUENCY (kHz)
520
540
560
580
600
620
640
TEMPERATURE (
o
C)
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
INTERNAL REFERENCE
VOLTAGE
('
%)
-40
-25 -10 5 80 95 110125
20 35
50
65
TEMPERATURE (
o
C)
-40
-25 -10 5 80 95 110125
20 35
50
65
BOOT PIN CURRENT (mA)
23.9
24
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.9
LM2743
SNVS276G –APRIL 2004–REVISED MARCH 2013 www.ti.com
Typical Performance Characteristics (continued)
BOOT Pin Current
vs Internal Reference Voltage
Temperature for BOOT Voltage = 12V vs
f
SW
= 300 kHz, FDS6898A FET, No-Load Temperature
Figure 9. Figure 10.
Frequency Output Voltage
vs vs
Temperature Output Current
Figure 11. Figure 12.
Switch Waveforms (HG Rising) Switch Waveforms (HG Falling)
V
CC
= 3.3V, V
IN
= 5V, V
OUT
= 1.2V V
CC
= 3.3V, V
IN
= 5V, V
OUT
= 1.2V
I
OUT
= 4A, C
SS
= 12nF, f
SW
= 300 kHz I
OUT
= 4A, C
SS
= 12nF, f
SW
= 300 kHz
Figure 13. Figure 14.
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