Datasheet
WPMDB1400362Q / 171040302
MagI
3
C Power Module
VDRM – Variable Step Down Regulator Module
we-online.com Würth Elektronik eiSos GmbH & Co. KG – Data Sheet Rev. 1.0
© May 2016 38/48
2: Analog Ground (AGND) connections
The ground connections for the clock setting resistor (R
RT
), soft-start capacitor (SS/TRK), output voltage setting resistor
(R
SET
) and enable components should be routed to the AGND pins of the device. If not properly handled, poor grounding can
result in degraded load regulation or erratic output voltage ripple behavior. Place R
RT
, and C
SS
close to their respective pins.
C
IN1
C
IN2
C
OUT1
C
OUT2
R
SET
R
RT
MagI
3
C Module
V
IN +
V
IN -
V
OUT -
V
OUT +
Bottom
GROUND PLANE
VIN
VIN
VIN
AGND
AGND
FB
VSENSE+
PGND
VOUT
RT/CLK
30
31
32
33
34
35
36
4
38
9
10
11
8
12
13
14
SW
1
29
28 27
UVLO
ENABLE
PG
6
SS/TRK
5 7
39
37
C
SS
3: Analog Ground (AGND) to Power Ground (PGND) connections
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.
C
IN1
C
IN2
C
OUT1
C
OUT2
R
SET
R
RT
MagI
3
C Module
V
IN +
V
IN -
V
OUT -
V
OUT +
Bottom
GROUND PLANE
VIN
VIN
VIN
AGND
AGND
FB
VSENSE+
PGND
VOUT
RT/CLK
30
31
32
33
34
35
36
4
38
9
10
11
8
12
13
14
SW
1
29
28 27
UVLO
ENABLE
PG
6
SS/TRK
5 7
39
37
C
SS
Module Internal connection: