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 29/48
Step 6 Select undervoltage lockout divider
Pin 29 connected to analog ground
This connects the internal undervoltage lockout resistor divider. The enable rising threshold is typ. 1.25V. The enable falling
threshold is at 1V max. Use at least 10% safety tolerance. For 3.3V input voltage use a rising threshold below 3V. This
threshold is attainable by leaving pin 29 open. An external undervoltage lockout resistor will set the rising threshold below
3V.
V
IN(UVLO)
rising threshold typ. [V] 3.14V
Hysteresis [mV] 300
Pin 29 connected to AGND with additional resistor to adjust undervoltage lockout.
V
IN(UVLO)
rising threshold typ. [V] 3.25 3.5 3.75 4.0 4.25 4.5 4.75
R
UVLO
[kΩ] 294 133 86.6 63.4 49.9 42.2 35.7
Hysteresis [mV] 325 335 345 355 365 375 385