tle4675 Infineon Technologies Corporation, tle4675 Datasheet - Page 16
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tle4675
Manufacturer Part Number
tle4675
Description
Low Drop Out Linear Voltage Regulator 5v Fixed Output Voltage
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TLE4675.pdf
(25 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
tle4675G
Manufacturer:
INFINEON/英飞凌
Quantity:
20 000
7
7.1
The reset function contains several features:
Output Undervoltage Reset:
An output undervoltage condition is indicated by setting the reset output “RO” to “low”. This signal might be used
to reset a microcontroller during a low supply voltage condition.
Power-On Reset Delay Time
The power-on reset delay time
time period from exceeding the upper reset switching threshold
reset output “RO” from “low” to “high”. The power-on reset delay time
capacitor
V
In case a power-on reset delay time
capacitor’s value can be derived from the specified value given in
with
•
•
•
The formula is valid for
Undervoltage Reset Delay Time
Unlike the power-on reset delay time, the undervoltage reset delay
event, where the delay capacitor
sequence starts. Therefore, the undervoltage reset delay time
current
A delay capacitor CD for a different undervoltage reset delay time as specified in
similar as above:
with
•
•
•
The formula is valid for
Data Sheet
C
C
D
D
D
= 0 V.
t
t
C
t
t
C
d,PWR-ON
d,PWR-ON,100nF
d
d,100nF
D
: Desired reset delay time
D
=
=
: Delay capacitor required
: Delay capacitor required
I
D,ch
---------------------------------- -
t
--------------- -
t
d,PWR-ON,100nF
d,100nF
C
: Reset delay time specified in
D
t
t
: Desired power-on reset delay time
starting from
d,PWR-ON
d
Reset Function
Description Reset Function
connected to pin “D”, which is charged up by the delay capacitor charge current
: Power-on reset delay time specified in
100nF
C
C
D
D
V
D
100nF
10nF.For a precise calculation consider also the delay capacitor’s tolerance.
=
10nF.For a precise calculation consider also the delay capacitor’s tolerance.
V
t
d,PWR-ON
DST,lo
C
D
and the external delay capacitor
t
is assumed to be discharged to
d,PWR-ON
Item 7.2.14
allows a microcontroller and oscillator to start up. This delay time is the
different from the value for
16
Item 7.2.15
V
RT,hi
Item
t
d
t
d
is defined by the delay capacitor charge
time considers a short output undervoltage
until the reset is released by switching the
C
7.2.15:
t
D
d,PWR-ON
.
V
D
C
=
D
V
= 100nF is required, the delay
DST,lo
is defined by an external delay
Item 7.2.14
only before the charging
Rev. 1.0, 2008-09-30
can be calculated
I
D,ch
Reset Function
starting from
TLE4675