TPS51220 Datasheet, PDF (16/37 Pages) Texas Instruments – Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

TPS51220
SLVS785 – OCTOBER 2007
TYPICAL CHARACTERISTICS (continued)
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5-V OUTPUT VOLTAGE
vs
OUTPUT CURRENT
5.10
D-CAP mode
Rgv = 10k
Cout-ESR = 40mW
VIN = 12V
5.05 ^OOA
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5.00
3.3-V OUTPUT VOLTAGE
vs
OUTPUT CURRENT
3.40
D-CAP mode
Rgv = 10k
Cout-ESR = 18mW
VIN = 12V
3.35
OOA
Auto-skip
3.30
CCM
CCM
4.95
3.25
4.90
0
1
2
3
4
5
6
I_O1 - 5-V Output Current - A
Figure 29.
5.0-V START-UP WAVEFORMS
3.20
0
1
2
3
4
5
6
I_O2 - 3.3-V Output Current - A
Figure 30.
3.3-V START-UP WAVEFORMS
EN1 (5V/div)
EN2 (5V/div)
VO1 (2V/div)
PGOOD1 (5V/div)
VIN=12V
Iout=6A
t - Time - 1ms/div
Figure 31.
VO2 (2V/div)
PGOOD2 (5V/div)
t - Time - 1ms/div
Figure 32.
VIN=12V
Iout=6A
16
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