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 30/48
Pin 29 open with additional resistor to adjust undervoltage lockout for lower values.
V
IN(UVLO)
rising threshold typ. [V] 3.0 2.75 2.5 2.25
R
UVLO
[kΩ] 34.0 39.7 47.5 60.4
Hysteresis [mV] 170 156 142 126
Step 7 Enable
The ENABLE pin provides electrical on/off control of the device. Once the ENABLE pin voltage exceeds the threshold
voltage, the device starts operation. If the ENABLE pin voltage is pulled below the threshold voltage, the regulator stops
switching and enters low quiescent current state. Apply a voltage ≤ 1V to the enable pin to disable the device. Left open or
set to ≥ 1.5V will enable the device. When manually disabling during lab tests, use short leads to connect to AGND of the
module. If the logic driver is not close to the ENABLE pin of the module, use a transistor (as shown below) to prevent the
noise from disturbing the proper ENABLE/DISABLE function.