tle4299 Infineon Technologies Corporation, tle4299 Datasheet - Page 15

• Manufacturer Part Number: tle4299
• Description: Low-drop Fixed Voltage Regulator
• Manufacturer: Infineon Technologies Corporation

Figure 8
The reset output is an open collector output. An external pull-up can be added with a
resistor value of at least 5.6 k .
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 V
V
V
Datasheet
Rth
RADJ TH
V
RO, SAT
V
V
V
= V
RT
DT
ST
V
V
V
V
Power-on-Reset
I
Q
D
RO
RADJ TH
is typical 1.36 V.
t
d
Reset Timing Diagram
* (R
ADJ1
Shutdown
Thermal
+ R
ADJ2
t
RR
) / R
ADJ2
Voltage Dip
at Input
(3)
15
Undervoltage
Secondary
Spike
<
t
RR
Rev. 1.1, 2007-10-17
Overload
at Output
I
>4.4V
d
d
V
t
=
C
I
TLE 4299
D
D
AED03107
t
t
t
t