TLE 4471G Infineon Technologies, TLE 4471G Datasheet - Page 16

• Manufacturer Part Number: TLE 4471G
• Manufacturer: Infineon Technologies

Specifications of TLE 4471G

• Packages: PG-DSO-20
• Regulator Type: multiple output
• Output Voltage: 5Vtrackertracker
• Accuracy: 2.0 %0.5 %0.5 %
• Max. Output Current: 450mA100mA50mA
• Dropout Voltage: 250mV

The reset delay time
calculated as follows:
Definitions:
•
•
•
•
For a delay capacitor
The undervoltage reset circuitry supervises the output voltage. In case
the reset threshold the reset output is set LOW after the reset reaction time
of the reset delay capacitor). The reset LOW signal is held down to an output voltage
of 1 V. Both, the reset reaction time and the reset delay time are defined by the capacitor
value.
The reset reaction time
LOW after the output voltage has dropped below the reset threshold. The reset reaction
time can be calculated using the following equation:
Data Sheet
t
t
rd
rr
=
C
t
V
I
=
dr
DR, ch
DR, dt
DR
C
C
= reset delay time required by the application
DR
DR
= reset delay capacitor
= charge current typical 4 A
= typical 1.8 V for power up reset
V
----------------------------------- -
V
-------------- -
I
DR ch
DR dt
DR dt
,
I
,
,
DR dis
–
,
V
t
dr
C
DR st
DR
is defined by the reset delay capacitor
t
,
rr
is the time it takes the voltage regulator to set its reset output
= 100 nF the typical power up reset delay time is 45 ms.
16
C
DR
at pin DR and can be
Rev. 1.6, 2009-02-03
V
Q1
t
rr
TLE 4471
falls below
(discharge
V
(1)
(2)
Q1