Datasheet

SLUU194 − May 2004
8
Using the TPS51020
4.2 Power-Up and Power-Down
Figures 3 and 4 show the power-up and power-down waveforms. The powergood (PGOOD) pin jumps to high
after both outputs have started and have been in regulation for 2048 clock pulses (6.8 ms).
Figure 3. Power-Up Waveform
t − Time − 5 ms/div
V
O2
5 V/div
V
IN
10 V/div
V
O1
5 V/div
PGOOD
5 V/div
Figure 4. Power-Down Waveform
t − Time − 500 µs/div
V
O2
5 V/div
V
IN
10 V/div
V
O1
5 V/div
PGOOD
5 V/div