Datasheet

Time = 2 s/divm
1 A/div
10 V/div
200 mV/div
C3: V ac coupled
IN
C1: SW
C4: I
L
I = 3.5 A
OUT
C2
C4
C1
Time = 2 s/divm
500 mA/div
10 V/div
50 mV/div
C3: V ac coupled
IN
C1: SW
C4: I
L
I = 100 mA
OUT
C3
C4
C1
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2.7 Input Voltage Ripple
The EVM CCM input voltage ripple is shown in Figure 14. The output current is the rated full load of 3.5 A
and V
IN
= 12 V. The voltage ripple is measured directly across the input capacitors.
The DCM input voltage ripple is shown in Figure 15. The output current is 0.1 A and V
IN
= 12 V.
Figure 14. Input Voltage Ripple CCM Figure 15. Input Voltage Ripple DCM
9
SLVU794A–October 2012–Revised February 2013 Using the TPS54340 Step-Down Converter Evaluation Module
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