TPS51220A_15 Datasheet, PDF (17/53 Pages) Texas Instruments – Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

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5.10
TPS51220A
SLUS897E – DECEMBER 2008 – REVISED JANUARY 2013
TYPICAL CHARACTERISTICS (continued)
5-V OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.3-V OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.40
5.08
5.06
Auto-Skip
5.04
5.02
3.38
Auto-Skip
and
3.36
OOA
3.34
3.32
5.00
OOA
4.98 _CCM
4.96
4.94
4.92
4.90
0 1 23 4
V_I = 12 V
D-CAP Mode
R_GV = 10 kW
5678
I_O1 – 5-V Output Current – A
Figure 29.
3.30
3.28 _CCM
3.26
3.24
3.22
3.20
0 1 23 4
V_I = 12 V
D-CAP Mode
R_GV = 10 kW
5678
I_O2 – 3.3-V Output Current – A
Figure 30.
5.0-V BODE-PLOT – GAIN AND PHASE
vs
FREQUENCY
80
180
Phase
60
135
3.3-V BODE-PLOT – GAIN AND PHASE
vs
FREQUENCY
80
180
Phase
60
135
40
90
40
90
20
45
20
45
0
Gain
Gain
0
0
0
–20
45
–20
45
–40
V_O= 5.0 V
–60
V_I = 12 V
I_O = 8 A
–80
100
1k
10 k
100 k
f – Frequency – Hz
Figure 31.
–90
–135
–180
1M
–40
V_O= 3.3 V
–60
V_I = 12 V
I_O = 8 A
–80
100
1k
10 k
100 k
f – Frequency – Hz
Figure 32.
–90
–135
–180
1M
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