TECHNICAL DATA
5-V Low-Drop Fixed Voltage Regulator
ILE4268
Features
•
Output voltage tolerance < ± 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
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, in the range 5.5 V < V, < 45 V to Vqrated = 5-O V.
In the event of an output voltage
VQ
< 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.
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IKSEMICON [ IK SEMICON CO., LTD ]
