Data Sheet

WPMDH1152401 / 171012402
MagI
3
C Power Module
VDRM – Variable Step Down Regulator Module
we-online.com Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 2.0
© December 2017
41/54
2: Analog Ground (AGND) connections
C
IN1
C
IN2
C
OUT1
C
OUT2
V
IN
GND GND
V
OUT
1
2
4
3
5 6
7
VIN
RON
EN
AGND
SS
FB
VOUT
R
ON
C
SS
R
FBT
R
FBB
C
FF
PGND
MagI
3
C Module
Bottom
GROUND PLANE
R
ENT
R
ENB
The ground connections for the soft-start capacitor (C
SS
), the output voltage lower resistor divider (R
FBB
) and enable
components (when used) should be routed to the AGND pin of the device. If not properly handled, poor grounding can result
in degraded load regulation or erratic output voltage ripple behavior. Place C
SS
, R
FBT
and R
FBB
close to their respective pins.
3: Analog Ground (AGND) to Power Ground (PGND) connections
C
IN1
C
IN2
C
OUT1
C
OUT2
V
IN
GND GND
V
OUT
1
2
4
3
5 6
7
VIN
RON
EN
AGND
SS
FB
VOUT
R
ON
C
SS
R
FBT
R
FBB
C
FF
PGND
MagI
3
C Module
Bottom
GROUND PLANE
R
ENT
R
ENB
Module internal connection:
The AGND is internally connected to PGND at a low noise node. The output ground current is flowing from the PGND pad
through the ground plane through the ground terminal of the first output capacitor. Due to its very low ripple it will not inject
noise in the ground plane.