Datasheet

SW (20.0 V/div)
V
IN
AC Coupled (50.0 mV/div)
I
L
(1.00 A/div)
Timebase (1.00 µs/div)
SW (10.0 V/div)
V
OUT
AC Coupled (20.0 mV/div)
Timebase (500 µs/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 12 V.
Figure 10. TPS55340EVM-017 V
IN
= 12-V Pulse-Skipping
4.9 Input Voltage Ripple
Figure 11 shows the EVM input voltage ripple. The output current is the rated full load of 800 mA at V
IN
=
5 V. The ripple is measured directly across the input capacitor, C2.
Figure 11. TPS55340EVM-017 V
IN
= 5-V Input Voltage Ripple
9
SLVU668A–April 2012–Revised July 2012 TPS55340EVM-017, 5-V to 12-V Input, 24-V Output Boost Evaluation Module
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