Datasheet
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© May 2016
Würth Elektronik eiSos GmbH & Co. KG - Data Sheet - REV 1.0
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WPMDU1251501 / 171021501
MagI³C Power Module
VDRM - Variable Step Down Regulator Module
PACKAGE
PGND
40
VOUT
39
SW
41
SW
38
AGND
37
VOUT
11
VOUT
10
NC 9
NC 8
SW 7
SW 6
AGND
5
AGND
4
RCCOMP
3
COMP
2
RSET INT
1
18 PGND
17 PGND
16 PGND
15 VOUT
14 VOUT
13 VOUT
12 VOUT
21 SW
22 SW
23 SW
24 SW
20 PGND
19 PGND
25 BOOT
26 VIN
27 EN/UVLO
28 SS/TRK
29 INTSS
FB 6
PG 35
AGND 34
AGND 33
AGND 32
RT/CLK 31
INTRRT 30
Top view
PGND
40
VOUT
39
SW
41
SW
38
AGND
37
Bottom view
36 FB
35 PG
34 AGND
33 AGND
32 AGND
31 RT/CLK
30 INTRRT
PGND 18
PGND 17
PGND 16
VOUT 15
VOUT 14
VOUT 13
VOUT 12
VOUT
11
VOUT
10
NC 9
NC 8
SW 7
SW 6
AGND
5
AGND
4
RCCOMP
3
COMP
2
RSET INT
1
21 SW
22 SW
23 SW
24 SW
20 PGND
19 PGND
25 BOOT
26 VIN
27 EN/UVLO
28 SS/TRK
29 INTSS
PIN DESCRIPTION
SYMBOL
PIN
TYPE
PIN DESCRIPTION
VIN
26
Power
The supply input pin is a terminal for an unregulated input voltage source. It is
required to place the input capacitor nearby the VIN pin and PGND.
VOUT
10, 11, 12,
13, 14, 15,
39
Power
The output voltage pins are connected to the internal inductor. Connect external
bypass capacitors between these pins and PGND.
PGND
16, 17, 18,
19, 20, 40
Power
This is the return current path for the power stage of the device. Connect these pins
to the load and to the bypass capacitors associated with VIN and VOUT. Pad 40
should be connected to PCB ground planes using multiple vias for good thermal
performance.
AGND
4, 5, 32,
33, 34, 37
Supply
These pins are connected to the internal analog ground (AGND) of the device. This
node should be treated as the zero volt ground reference for the analog control
circuitry. Pad 37 should be connected to PCB ground planes using multiple vias for
good thermal performance. Not all pins are connected together internally. All pins
must be connected together externally with a copper plane. Connect AGND to PGND
at a single point (at the ground terminal of the first output capacitor). See Layout
section for recommendations.
RSET INT
1
Analog
An internal resistor of 10KΩ is connected internally between R
SET INT
and FB. This is
the low side resistor of the feedback voltage divider.
Must be connected to AGND.
FB
36
Input
Connect a resistor from the last output capacitor terminal to FB to set the output
voltage.