Datasheet

0.001
0.1
0.01 100
1
1000
f
SW
– Switching Frequency – kHz
10
100
V
IN
= 12 V
R
RF
= 39 kW
0.1 1 10
FCCM
Auto-Skip
I
OUT
– Output Current – A
0.001 0.01 100
V
IN
= 12 V
R
RF
= 470 kW
0.1 1 10
I
OUT
– Output Current – A
MODE
Auto-Skip
FCCM
1.08
1.09
1.12
V
OUT
– Output Voltage – V
1.10
1.11
h – Efficiency – %
0.001 0.01 1000.1 1 10
I
OUT
– Output Current – A
0
100
50
80
70
60
R
RF
= 470 kW
V
OUT
= 1.1 V
90
Auto-Skip
FCCM
20
30
10
40
V
IN
(V)
8
12
20
1.08
1.09
1.12
V
OUT
– Output Voltage – V
1.10
1.11
Auto-Skip
R
RF
= 470 kW
6 8 16 18 22
V
IN
– Input Voltage – V
201410 12
I
OUT
= 20 A
I
OUT
= 0 A
TPS51218
SLUS935B –MAY 2009–REVISED FEBRUARY 2012 www.ti.com
TYPICAL CHARACTERISTICS (continued)
SWITCHING FREQUENCY OUTPUT VOLTAGE
vs vs
OUTPUT CURRENT OUTPUT CURRENT
Figure 9. Figure 10.
OUTPUT VOLTAGE 1.1-V EFFICIENCY
vs vs
INPUT VOLTAGE OUTPUT CURRENT
Figure 11. Figure 12.
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