Datasheet

0
150
250
300
400
f
SW
– Switching Frequency – kHz
100
200
350
50
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OOA
CCM
I
O1
– 5-V Output Current – A
0.001 0.01 0.1 1 10
0
150
250
300
f
SW
– Switching Frequency – kHz
100
200
350
50
Auto-Skip
OOA
CCM
I
O2
– 3.3-V Output Current – A
0.001 0.01 0.1 1 10
400
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OOA
CCM
0
20
40
60
80
100
h – Efficiency – %
0.001 0.01 0.1 1 10
I
O2
– 3.3-V Output Current – A
V
I
= 12 V
Current Mode
R
GV
= 12 kW
5.0-V SMPS: ON
V
I
= 8 V
40
50
60
80
90
100
h – Efficiency – %
0.001 0.01 0.1 1 10
I
O2
– 3.3-V Output Current – A
V
I
= 12 V
V
I
= 20 V
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Current Mode
R
GV
= 12 kW
5.0-V SMPS: ON
70
TPS51220A
www.ti.com SLUS897E –DECEMBER 2008–REVISED JANUARY 2013
TYPICAL CHARACTERISTICS (continued)
3.3-V EFFICIENCY 3.3-V EFFICIENCY
vs vs
OUTPUT CURRENT OUTPUT CURRENT
Figure 21. Figure 22.
5-V SWITCHING FREQUENCY 3.3-V SWITCHING FREQUENCY
vs vs
OUTPUT CURRENT OUTPUT CURRENT
Figure 23. Figure 24.
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