Datasheet

0 0.3 0.6 0.9 1.2 1.5
-3
-2
-1
0
1
2
3
'V
OUT
(%)
LOAD CURRENT (A)
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 24V
V
OUT
= 0.8V
R
ON
= 30 k:
L = 6.8 PH
0 0.3 0.6 0.9 1.2 1.5
-3
-2
-1
0
1
2
3
'V
OUT
(%)
LOAD CURRENT (A)
V
IN
= 8V
V
IN
= 18V
V
IN
= 36V
V
OUT
= 3.3V
0 0.3 0.6 0.9 1.2 1.5
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
V
IN
= 4.5V
V
IN
= 12V
V
IN
= 24V
V
OUT
= 0.8V
R
ON
= 30 k:
L = 6.8 PH
-50 -20 10 40 70 100 130
TEMPERATURE (ºC)
Main MOSFET
Syn. MOSFET
0
0.1
0.2
0.3
0.4
R
DS(ON)
(:)
0 0.3 0.6 0.9 1.2 1.5
40
50
60
70
80
90
100
EFFICIENCY (%)
LOAD CURRENT (A)
V
IN
= 8V
V
IN
= 18V
V
IN
= 36V
LM3100
SNVS421G –JANUARY 2006–REVISED APRIL 2013 www.ti.com
Typical Performance Characteristics (continued)
All curves taken at V
IN
= 18V with configuration in typical application circuit for V
OUT
= 3.3V shown in this datasheet. T
A
=
25°C, unless otherwise specified.
Efficiency vs Load Current
R
DS(ON)
vs Temperature (V
OUT
= 3.3V)
Figure 8. Figure 9.
V
OUT
Regulation vs Load Current Efficiency vs Load Current
(V
OUT
= 3.3V) (V
OUT
= 0.8V)
Figure 10. Figure 11.
V
OUT
Regulation vs Load Current Power Up
(V
OUT
= 0.8V) (V
OUT
= 3.3V, 1.5A Loaded)
Figure 12. Figure 13.
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