ILE4268 Datasheet, PDF (1/8 Pages) IK Semicon Co., Ltd – 5-V Low-Drop Fixed Voltage Regulator

5-V Low-Drop Fixed Voltage Regulator
TECHNICAL DATA
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.
1