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TLE4268 Datasheet

  • TLE4268

  • 5-V Low-Drop Fixed Voltage Regulator

  • 138.92KB

  • Infineon

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5-V Low-Drop Fixed Voltage Regulator
TLE 4268
Features
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Output voltage tolerance
鈮?卤
2 %
Very low current consumption
Low-drop voltage
Watchdog
Settable reset threshold
Overtemperature protection
Reverse polarity protection
Short-circuit proof
Suitable for use in automotive electronics
Wide temperature range
P-DSO-8-1
Type
TLE 4268 GS
TLE 4268 G
Ordering Code
Q67006-A9229
Q67006-A9146
Package
P-DSO-8-1 (SMD)
P-DSO-20-6 (SMD)
P-DSO-20-6
Functional Description
This device is a 5-V low-drop fixed-voltage regulator. The maximum input voltage is
45 V. It can deliver an output current of at least 180 mA. The IC is short-circuit proof and
features temperature protection that disables the circuit in the event of impermissibly
high temperatures. The watchdog function is disabled as a function of the load, so that
a controller is not interrupted during sleep mode by a watchdog reset.
Application Description
The IC regulates an input voltage
V
i
in the range 5.5 V
<
V
i
<
45 V to
V
qrated
= 5.0 V. In
the event of an output voltage
V
Q
<
V
RT
, a reset signal is generated. The wiring of the
reset switching threshold input enables the value of
V
RT
to be reduced. The reset delay
time can be adjusted using an external capacitor. The integrated watchdog monitors the
connected active controller. If there is no positive-going edge at the watchdog input, the
reset output is set to low. The reset delay capacitor provides a wide adjustment range
for the pulse repetition time. The watchdog function is only activated if the load exceeds
8 mA. This ensures that a microcontroller is not activated during power-down and the
current drain is not increased. The IC is protected against overload and
overtemperature.
Semiconductor Group
1
1998-11-01

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