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PDF ILE4268 Data sheet ( Hoja de datos )

Número de pieza ILE4268
Descripción 5-V Low-Drop Fixed Voltage Regulator
Fabricantes Integral 
Logotipo Integral Logotipo



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No Preview Available ! ILE4268 Hoja de datos, Descripción, Manual

ILE4268
5-V Low-Drop Fixed Voltage Regulator
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
Type
Ordering Code
Package
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 < VRT, a reset signal is generated. The wiring of the reset
switching threshold input enables the value of VRT 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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ILE4268 pdf
ILE4268
Charging current Id
5 12 18 µA Vc = 1.0V
Switching voltage VCd
1.6 1.8 2.0 V -
Lower switching VDWL 0.2 0.4 0.55 V
threshold
Watchdog periode TWP
Watchdog trigger FWT
time
30 55 75 ms Q = 100nF
25 40 60 ms Cd = 100nF
Activating current IQ
Slew rate
Vw
2
5
8 15 mA Activates watchdog
— — V/µs from 20 % up to 80 % VQ
Note: The reset output is low in range from VQ= 1 V to VRT.
1 Drop voltage = VI- VQ (measured when the output voltage has dropped 100 mV from the
nominal value obtained at 13.5 V input)
Figure 4 Test Circuit
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