Datasheet

C3: V
IN
(2.00 V/div)
C2: V
OUT
(5.00 V/div)
C1: SW (10.0 V/div)
Timebase = 2.00 ms/div
C3: V
IN
(5.00 V/div)
C2: V
OUT
(5.00 V/div)
C1: SW (20 V/div)
Timebase = 20.0 ms/div
C4: EN (2.00 V/div)
www.ti.com Test Setup and Results
Figure 14 shows the shutdown waveforms for the TPS55340EVM-147. The input voltage is 6V. The EN
goes low and the output voltage ramps from 12V to 0V. The load is 120Ω.
Figure 14. TPS55340EVM-147 Power Down With EN
4.11 Powering Up and Down with VIN
Figure 15 shows the start-up waveforms for the TPS55340EVM-147. The input voltage ramps with the
input voltage power supply and EN is tied to V
IN
. V
IN
ramps up, the converter starts switching and the
output voltage ramps to 12V. The load is 120Ω.
Figure 15. TPS55340EVM-147 Power Up With V
IN
11
SLVU742A–June 2012–Revised August 2013 TPS55340EVM-147, 6V to 18V Input, 12V Output SEPIC Evaluation Module
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