Datasheet

V = 10 V / div
IN
V = 2 V / div
OUT
PH = 10 V / div
Time = 2 msec / div
V = 2 V / div
OUT
PH = 10 V / div
Inductor Current = 5 A / div
Time = 20 msec / div
www.ti.com Test Setup and Results
2.10 Pre-Bias Start-Up
The TPS54622 is designed to start up into a pre-biased output. The output voltage is not discharged to
ground at the beginning of the slow-start sequence. Figure 11 shows the start-up waveform with the
output voltage pre-biased to 1 V.
Figure 11. TPS54622EVM-012 Start Up Into Pre-Bias
2.11 Hiccup Mode Current Limit
The TPS54622 features hiccup mode current limit. When an overcurrent event occurs, the TPS54622
shuts down and restarts. Figure 12 shows restart sequence in an over current condition.
Figure 12. TPS54622EVM-012 Hiccup Mode Current Limit
11
SLVU441A–May 2011–Revised September 2011 TPS54622EVM-012, 6-A, SWIFT™ Regulator— Evaluation Module
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