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Número de pieza | ILE4268 | |
Descripción | 5-V Low-Drop Fixed Voltage Regulator | |
Fabricantes | Integral | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de ILE4268 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
No Preview Available ! 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.
1
1 page 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
5
5 Page |
Páginas | Total 6 Páginas | |
PDF Descargar | [ Datasheet ILE4268.PDF ] |
Número de pieza | Descripción | Fabricantes |
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