TPS51117
SLVS631B –DECEMBER 2005–REVISED SEPTEMBER 2009...................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
MODE TRANSITION
AUTO-SKIP TO PWM
MODE TRANSITION
PWM TO AUTO-SKIP
V
O
(20 mV/div)
V
(20 mV/div)
O
LL (10 V/div)
LL (10 V/div)
DRVL (5 V/div)
DRVL (5 V/div)
EN_PSV (5 V/div)
EN_PSV (5 V/div)
Figure 19.
Figure 20.
2.5 SHUTDOWN WAVEFORMS
2.5 V START-UP WAVEFORMS
EN_PSV (2 V/div)
EN_PSV (2 V/div)
V
(1 V/div)
O
V
(1 V/div)
O
PDOOD (5 V/div)
DRVL (5 V/div)
PGOOD (5 V/div)
t - Time - 1 ms/div
t - Time - 10 ms/div
Figure 21.
Figure 22.
16
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