|
TLE4299_07 Datasheet, PDF (15/25 Pages) Infineon Technologies AG – Low-Drop Fixed Voltage Regulator | |||
|
◁ |
TLE 4299
VI
VQ
V RT
VD
V DT
V ST
V RO
td
VRO, SAT
Power-on-Reset
t RR
Thermal
Shutdown
t
< t RR
dV
dt
=
ID
CD
t
t
Voltage Dip
at Input
Undervoltage
Secondary Overload
Spike at Output
t
AED03107
Figure 8 Reset Timing Diagram
The reset output is an open collector output. An external pull-up can be added with a
resistor value of at least 5.6 kâ¦.
In addition the reset switching threshold can be adjusted by an external voltage divider.
The feature is useful for microprocessors which guarantee safe operation down to volt-
ages below the internally set reset threshold of 3.10V typical. If the internal used reset
threshold of typical 3.10V is used, the pin RADJ has to beconnected to GND.
If a lower reset threshold is required by the system, a voltage divider defines the reset
threshold VRth between 2.5V and 3.10V as long as the Input Voltage VI>4.4V
VRth = VRADJ TH * (RADJ1 + RADJ2) / RADJ2 (3)
VRADJ TH is typical 1.36 V.
Datasheet
15
Rev. 1.1, 2007-10-17
|
▷ |