TPS51117
www.ti.com...................................................................................................................................... SLVS631B –DECEMBER 2005–REVISED SEPTEMBER 2009
TYPICAL CHARACTERISTICS (continued)
1.05 V EFFICIENCY
vs
2.5 V EFFICIENCY
vs
OUTPUT CURRENT
OUTPUT CURRENT
100
90
80
70
60
50
40
30
20
100
90
80
70
60
50
40
30
20
Auto Skip
V
= 8 V
I
V = 12 V
I
V = 8 V
I
V = 8 V
I
V = 12 V
I
V = 20 V
V = 8 V
I
I
V = 12 V
I
V = 12 V
V = 20 V
I
I
V = 20 V
I
V = 20 V
I
PWM Only
f
PWM Only
= 350 kHz
10
0
10
0
= 300 kHz
sw
f
sw
0.001
0.01
I
0.1
1
10
0.001
0.01
I
0.1
1
10
- Output Current - A
- Output Current - A
O
O
Figure 15.
Figure 16.
1.05 V LOAD TRANSIENT RESPONSE
2.5 V LOAD TRANSIENT RESPONSE
V
(50 mV/div)
O
V
(50 mV/div)
O
I
(5 A/div)
IND
I
(5 A/div)
IND
I
(5 A/div)
O
I
(5 A/div)
O
t - Time - 10 ms/div
t - Time - 10 ms/div
Figure 17.
Figure 18.
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