Datasheet

Start-Up
2-13
Test Setup and Results
Figure 2−20. Input Voltage Ripple, TPS54910
V
O
(AC) 100 mV/div
Time Scale 1 µs/div
2.9 Start-Up
The start-up voltage waveforms of the SLVP213 are shown in Figure 2−21,
Figure 2−22, and Figure 2−23. There is approximately a 9-ms delay after the
input voltage rises above the 2.9-V (3.8 V for the TPS54810) startup voltage
threshold until the output voltage begins to ramp up to the final value of 1.8 V.
The output voltage tracks the greater of the internal and external slow start
voltages, accounting for the change in ramp rates.
Figure 2−21. Measured Start-Up Waveform, TPS54610
V
I
2 V/div
V
O
1 V/div
Time Scale 5 ms/div