TPS53353_16 Datasheet, PDF (9/37 Pages) Texas Instruments – Synchronous Buck SWIFT Converter

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Typical Characteristics (continued)
V_IN = 12 V
I_OUT = 20 A
EN (5 V/div)
V_OUT (0.5 V/div)
VREG(5 V/div)
PGOOD (5 V/div)
Time (1 ms/div)
Figure 13. Start-Up Waveforms
V_IN = 12 V
I_OUT = 20 A
EN (5 V/div)
V_OUT (0.5 V/div)
VREG(5 V/div)
PGOOD (5 V/div)
Time (20 ms/div)
Figure 15. Shutdown Waveforms
FCCM
V_IN = 12 V
I_OUT = 0 A
V_OUT (20 mV/div)
TPS53353
SLUSAK2C – AUGUST 2011 – REVISED FEBRUARY 2016
V_IN = 12 V
I_OUT = 0 A
0.5 V pre-biased
VREG(5 V/div)
PGOOD (5 V/div)
EN (5 V/div)
V_OUT (0.5 V/div)
Time (1 ms/div)
Figure 14. Prebias Start-Up Waveforms
V_EN = 5 V
V_DD = V_IN
I_OUT = 20 A
V_IN (5 V/div)
V_OUT (0.5 V/div)
VREG(5 V/div)
PGOOD (5 V/div)
Time (2 ms/div)
Figure 16. UVLO Start-Up Waveforms
Skip Mode
V_IN = 12 V
I_OUT = 0 A
V_OUT (20 mV/div)
LL (5 V/div)
I_L (5 A/div)
LL (5 V/div)
I_L (5 A/div)
Time (2 ms/div)
Figure 17. 1.1-V Output FCCM Mode Steady-State Operation
Time (1 ms/div)
Figure 18. 1.1-V Output Skip Mode Steady-State Operation
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