Datasheet

5V/DIV
2V/DIV
1A/DIV
TIME (2 ms/DIV)
V
IN
I
L
V
O
2V/DIV
2V/DIV
1A/DIV
TIME (2 ms/DIV)
V
EN
I
L
V
O
0.0 0.4 0.8 1.2 1.6 2.0
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
VIN = 4.5V
VIN = 9V
VIN = 12v
VIN = 24V
VIN = 42v
0.0 0.4 0.8 1.2 1.6 2.0
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
ûV
OUT
(%)
LOAD CURRENT (A)
VIN = 4.5V
VIN = 9V
VIN = 12V
VIN = 24V
VIN = 42V
0.0 0.4 0.8 1.2 1.6 2.0
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
VIN = 4.5V
VIN = 9V
VIN = 12V
VIN = 24V
VIN = 42V
0.0 0.4 0.8 1.2 1.6 2.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
ûV
OUT
(%)
LOAD CURRENT (A)
VIN = 4.5V
VIN = 9V
VIN = 12V
VIN = 24V
VIN = 42V
LMR24220
www.ti.com SNVS737E –OCTOBER 2011–REVISED APRIL 2013
Typical Performance Characteristics (continued)
Unless otherwise speficified all curves are taken at V
IN
= 18V with the configuration in the typical application circuit for
V
OUT
= 3.3V (Figure 26) T
A
= 25°C.
Efficiency vs Load Current V
OUT
Regulation vs Load Current
(V
OUT
= 3.3V) (V
OUT
= 3.3V)
Figure 8. Figure 9.
Efficiency vs Load Current V
OUT
Regulation vs Load Current
(V
OUT
= 0.8V) (V
OUT
= 0.8V)
Figure 10. Figure 11.
Power Up Startup with Enable
(V
OUT
= 3.3V, 2A Loaded) (V
OUT
= 3.3V, 2A Loaded)
Figure 12. Figure 13.
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