TLE42694_10 Datasheet, PDF (18/29 Pages) Infineon Technologies AG – Low Dropout Fixed Voltage Regulator

TLE42694
Block Description and Electrical Characteristics
Reset Adjust Function
The undervoltage reset switching threshold can be adjusted according to the application’s needs by connecting
an external voltage divider (R_ADJ1, R_ADJ2) at pin RADJ. For selecting the default threshold connect pin RADJ to
GND.
When dimensioning the voltage divider, take into consideration that there will be an additional current constantly
flowing through the resistors.
With a voltage divider connected, the reset switching threshold V_RT,new is calculated as follows:
V_{RT, new}
=
R-----_{A---D----J--,--1----}+_{-----R----A----D----J--,--2-}
R_{ADJ, 2}
×
V _{R A D J,}
th
with
• V_RT,new: the desired new reset switching threshold
• R_ADJ1, R_ADJ2: resistors of the external voltage divider
• V_RADJ,th: reset adjust switching threshold given in Table “Electrical Characteristics Reset Function” on
Page 21
Data Sheet
18
Rev. 1.2, 2010-11-26