Datasheet

Data Sheet 18 Rev. 1.6, 2009-02-03
TLE 4471
Figure 6 Adjusting the Reset Threshold
For using the preadjusted reset threshold voltage of typical
V
Q, rth
= 4.65 V, the pin RADJ
has to be connected to GND.
If a lower reset threshold is required by the system, a voltage divider defines the reset
threshold
V
Q, rthext
between 3.5 V and 4.65 V:
(3)
V
rth,ref
is typical 1.35 V.
AES02877
Bandgap
Reference
TLE 4471
Q
I
1
1.36 V
R
RADJ
R
RTH1
R
RTH2
V
rth,ref
V
Qrthext,
V
rth ref,
1
R
RTH1
R
RTH2
---------------+


×=