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
PINS FOR OPTIONAL USE
SYMBOL
PIN
TYPE
PIN DESCRIPTION
EN/UVLO
27
Input
Enable and UVLO adjust pin. Use an open drain or open collector logic device to
ground this pin to disable the device. A resistor divider between this pin, AGND, and
VIN sets the UVLO voltage.
RT/CLK
31
Input
This pin sets the switching frequency. Left open will set the internal oscillator to the
default switching frequency. An external resistor from this pin to AGND sets a user
defined switching frequency. This pin can also be used to synchronize with an
external clock.
INTRRT
30
Analog
Internal Resistor (R
RT INT
) which defines the default switching frequency. Must be
connected to AGND.
SS/TRK
28
Input
Soft-start and tracking pin. Connecting an external capacitor to this pin adjusts the
output voltage rise time during start-up. A voltage applied to this pin allows for tracking
and sequencing control.
INTSS
29
Input
Internal soft-start or track feature select. Connect this pin to AGND to enable the
internal SS capacitor. Leave this pin open to enable the tracking feature of pin
SS/TRK.
PG
35
Output
Power Good flag pin. This open drain output asserts low if the output voltage is more
than approximately ±6% out of regulation. A pull-up resistor is required if this function
is used.
AUXILIARY PINS DESCRIPTION
SYMBOL
PIN
TYPE
PIN DESCRIPTION
COMP
2
Output
Output of the error amplifier. Do Not Connect. This pin must be soldered to an isolated
pad.
RCCOMP
3
Analog
Internal R and C of the compensation network. Do Not Connect. This pin must be
soldered to an isolated pad.
BOOT
25
Supply
Internal bootstrap pin for the high-side MOSFET. Do Not Connect. This pin must be
soldered to an isolated pad.
SW
6, 7, 21,
22, 23, 24,
38, 41
Power
Switch node. Do not place any external component on these pins or tie them to a pin
of another function.
NC
8, 9
Not
connect.
These pins are not connected to the internal circuitry, and are not connected to each
other.