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6 10 14 18 248 12 16 20 22 26
5.000
4.950
4.975
5.025
5.050
I
O
= 6 A
I
O
= 0 A
V
OUT1
− 5-V Output Voltage − V
V
IN
− VIN Input Voltage − V
6 10 14 18 248 12 16 20 22 26
3.33
3.27
3.32
3.28
3.31
3.30
3.32
I
O
= 6 A
I
O
= 0 A
V
OUT2
− 3.3-V Output Voltage − V
V
IN
− VIN Input Voltage − V
0.001 0.01
0
0.1 1 10
20
40
60
80
100
η − Efficiency − %
Auto−Skip
PWM Only
5-V Switcher ON
I
OUT1
− 3.3−V Output Current − A
VIN = 8 V
VIN = 12 V
VIN = 20 V
VIN = 8 V
VIN = 12 V
VIN = 20 V
0.001 0.01
0
0.1 1 10
20
40
60
80
100
η − Efficiency − %
Auto−Skip
PWM Only
I
OUT1
− 5−V Output Current − A
VIN = 8 V
VIN = 12 V
VIN = 20 V
VIN = 8 V
VIN = 12 V
VIN = 20 V
TPS51120
SLUS670B – JULY 2005 – REVISED FEBRUARY 2007
TYPICAL CHARACTERISTICS (continued)
5-V OUTPUT VOLTAGE 3.3-V OUTPUT VOLTAGE
vs vs
INPUT VOLTAGE INPUT VOLTAGE
Figure 27. Figure 28.
5-V EFFICIENCY 3.3-V EFFICIENCY
vs vs
OUTPUT CURRENT OUTPUT CURRENT
Figure 29. Figure 30.
29
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