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TLE42994GM Datasheet(PDF) 22 Page - Infineon Technologies AG

Part # TLE42994GM
Description  Extreme Low Current Consumption In ON State
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE42994GM Datasheet(HTML) 22 Page - Infineon Technologies AG

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Data Sheet
22
Rev. 1.2, 2014-07-03
TLE42994
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, RADJ2) 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:
(3)
with
•
V
RT,new: the desired new reset switching threshold
•
R
ADJ1, RADJ2: resistors of the external voltage divider
•
V
RADJ,th: reset adjust switching threshold given in Table 7 “Electrical Characteristics Reset Function” on
Page 24
Figure 7
Block Diagram Reset Function
VRT new
,
RADJ 1
,
R
+
ADJ 2
,
RADJ 2
,
------------------------------------------ V
RADJ th
,
×
=
GND
Q
I
BlockDiagram_ResetAdjust.vsd
OR
Supply
RO
VDST
Int.
Supply
I
D,ch
I
D,dch
VRADJ,th
RADJ
Control
D
C
D
Reset
C
Q
VDD
Micro-
Controller
GND
R
ADJ,1
R
ADJ,2
R
RO
I
RO
I
RADJ
R
RO,ext


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