Datasheet

Start-up
2-10
2.10 Start-up
The start-up voltage waveform of the TPS54610 EVM is shown in
Figure 215. There is approximately a 12.8-ms delay after the input voltage
rises above the 3.0-V start-up voltage threshold before the TPS54610 EVM
output begins to rise. The output voltage then ramps to 3.3 V in 7.2 ms. The
change of slope in the output voltage rising edge occurs at the point where
control of the TPS54610 EVM internal reference voltage changes from the
internally controlled slow start to the externally controlled slow start.
Decreasing the value of C2 can decrease the start-up delay time and slow start
time. To program a specific slow start time, see Chapter 1, Section 1.3,
Modifications. If C2 is left unpopulated, the start-up delay time is eliminated,
and the slow start time is typically 3.6 ms.
Figure 215. Measured Start-Up Waveforms
V
I
= 5 V
4 ms/div
V
O
1 V/div
V
I
2 V/div