TPS51117
www.ti.com...................................................................................................................................... SLVS631B –DECEMBER 2005–REVISED SEPTEMBER 2009
TYPICAL CHARACTERISTICS (continued)
MEASURED SWITCHING FREQUENCY
SWITCHING FREQUENCY
vs
vs
TON RESISTANCE
INPUT VOLTAGE
800
700
600
500
400
300
200
500
450
400
350
300
250
200
150
100
50
V = 15 V,
I
= 2 A,
I
PWM Mode
O
PWM Mode
V
= 1.05 V
O
V
= 2.5 V
O
V
= 2.5 V
O
100
0
V
= 1.05 V
O
0
5
9
13
17
21
25
100
200
300
400
500
600
700
V - Input Voltage - V
I
R
- TON Resistance - kW
TON
Figure 7.
Figure 8.
SWITCHING FREQUENCY
vs
SWITCHING FREQUENCY
vs
OUTPUT CURRENT (1.05 V)
OUTPUT CURRENT (2.5 V)
450
450
400
350
300
250
200
150
100
50
400
350
300
250
200
150
100
50
PWM Only
PWM Only
Auto Skip
Auto Skip
0
0.001
0
0.001
0.010
0.100
1.000
10.000
0.010
I
0.1
- Output Current - A
1
10
O
I
- Output Current - A
O
Figure 9.
Figure 10.
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