WPMDH1100601 / 171010601
MagI3C Power Module
VDRM – Variable Step Down Regulator Module
OUTPUT VOLTAGE RIPPLE
The output voltage ripple of the VOUT depends on several parameters, as already shown in DESIGN FLOW – Step4. The
operating mode (CCM or DCM) further influences the output voltage ripple as shown in the two figures below:
VOUT ripple - VIN = 24V, VOUT = 5V, IOUT = 50mA, fSW = 500kHz - DCM operation
30
30mV
20
10
0
-10
-20
-30
0
20
40
60
80
100
120
Time [µs]
VOUT ripple - VIN = 24V, VOUT = 5V, IOUT = 1A, fSW = 500kHz - CCM operation
30
20
10
0
9mV
-10
-20
-30
0
2
4
6
8
10
12
14
16
18
20
Time [µs]
The output voltage ripple during CCM operation is much lower (<10mVpp) than the ripple during DCM operation (around
30mVpp).
we-online.com
Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0
© September 2017
34/54
WURTH [ WURTH ELEKTRONIK GMBH & CO. KG, GERMANY. ]
