Datasheet

C3: I
Lb
(1.00 A/div)
C2: SW (10.0 V/div)
C1: V
IN
AC Coupled (50 mV/div)
Timebase = 2.00 µs/div
C4: I
La
(1.00 A/div)
C3: I
Lb
(1.00 A/div)
C2: SW (20.0 V/div)
C1: V
OUT
AC Coupled (50 mV/div)
Timebase = 2.00 µs/div
C4: I
La
(1.00 A/div)
www.ti.com Test Setup and Results
4.8 Pulse-Skipping Operation
The TPS55340 features pulse-skipping for output regulation when operating at light loads. Figure 9 shows
the output voltage ripple and the pulse-skipping at SW. The input voltage is 18V.
Figure 10. TPS55340EVM-147 V
IN
= 18V Pulse-Skipping
4.9 Input Voltage Ripple
Figure 11 shows the TPS55340EVM-147 input voltage ripple. The output current is the rated full load of
1A at V
IN
= 6V. The ripple is measured directly across the input capacitor C2.
Figure 11. TPS55340EVM-147 V
IN
= 6V Input Voltage Ripple
9
SLVU742A–June 2012–Revised August 2013 TPS55340EVM-147, 6V to 18V Input, 12V Output SEPIC Evaluation Module
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