tle4675 Infineon Technologies Corporation, tle4675 Datasheet - Page 17

• Manufacturer Part Number: tle4675
• Description: Low Drop Out Linear Voltage Regulator 5v Fixed Output Voltage
• Manufacturer: Infineon Technologies Corporation

Reset Reaction Time
In case the output voltage of the regulator drops below the output undervoltage lower reset threshold
delay capacitor CD is discharged rapidly. Once the delay capacitor’s voltage has reached the lower delay
switching threshold
Additionally to the delay capacitor discharge time
time
with
•
•
•
Reset Output Pull-Up Resistor
The Reset Output RO is an open collector output requiring an external pull-up resistor to a voltage
Item 7.2.7
For applications, where the external pull-up resistor
V
Item
:
with
•
•
•
Please be aware, that
Reset Output “RO” Low for
In case of an undervoltage reset condition reset output “RO” is held “low” for
is 0 V. This is achieved by supplying the reset circuit from the output capacitor.
Data Sheet
t
R
rr,total
Q
RO
, the minimum pull-up resistor
t
t
t
typical performance graphs.
R
V
V
rr,total
rr,int
rr,d
t
RO
IO
RO,low
7.2.6:
rr,total
: Delay capacitor discharge time. For a capacitor
: Voltage rail, where the pull up resistor is connected
=
: Internal reset reaction time; see
: Reset pull up resistor
=
: total reset reaction time
V
--------------------------------- -
: Maximum allowed voltage level for a logic “Low” signal inside the application
becomes:
t
a minimum value for the external resistor
rr,int
IO
I
RO max
–
+
V
t
RO,low
rr,d
V
DST,lo
V
IO
, the reset output RO will be set to “low”.
should not exceed the ratings for the RO pin given in
V
Q
R
R
RO
1 V
RO
:
can be calculated out of the minimum sink current capability given in
Item 7.2.16
t
rr,d
R
R
an internal time
RO
RO
17
C
is given for the case it is connected to
has to be connected to a different voltage rail
D
different from the value specified in
t
rr,int
applies. Hence the total reset reaction
V
Q
Item
1 V, even if the input voltage
4.1.3.
Rev. 1.0, 2008-09-30
Item
V
Reset Function
Q
V
.
IO
7.2.17, see
, e.g.
TLE4675
V
V
RT,lo
IO
V
, the
than
Q
. In
V
I