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ILE4268 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 5-V Low-Drop Fixed Voltage Regulator - Integral

भाग संख्या ILE4268
समारोह 5-V Low-Drop Fixed Voltage Regulator
मैन्युफैक्चरर्स Integral 
लोगो Integral लोगो 
पूर्व दर्शन
1 Page
		
<?=ILE4268?> डेटा पत्रक पीडीएफ

ILE4268 pdf
ILE4268
Pin Definitions and Functions
Pin Symbol Function
1 VI
2 N.C.
Input voltage
Not connected
3 QRES Reset output
4 GND Ground
5 DRES Reset delay
6 SRES Reset switching threshold
7W
Watchdog input
8 VQ
5-V output voltage
Pin Configuration
(top view)
Pin Definitions and Functions
Pin
Symbol
Function
1,2,8,13, 19,20 N.C.
Not connected.
3
QRES
Reset output; the open collector output is connected to the 5-V output via
an integrated resistor of 30 kt2.
4...7, 14... 17 GND
Ground
9
DRES
Reset delay; connect a capacitor to ground for delay time adjustment.
10
SRES
Reset switching threshold; for setting the switching threshold, output to
ground with voltage divider. If this input is connected to ground, the reset is
triggered at an output voltage of 4.5 V.
11 W Watchdog input; positive-edge-triggered input for monitoring a
microcontroller.
12 VQ 5-V output voltage; block to ground with 22-)iF capacitor, ESR<30
18 Vi Input voltage; block to ground directly on the 1C with ceramic capacitor.
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and drives the
base of the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element. If The externally scaled down
output voltage at the reset threshold input drops below 1.35 V, the external reset delay
capacitor is discharged by the reset generator. If the voltage on the capacitor reaches the
lower threshold VST, a reset signal is generated on the reset output and not cancelled
again until the upper threshold voltage is exceeded. If the reset threshold input is
connected to GND, reset is triggered at an output voltage of 4.5 V. A connected
microcontroller is monitored by the watchdog logic. If pulses are missing, the rest output is
set to low. The pulse sequence time can be set within a wide range with the reset delay
capacitor. The 1C also incorporates a member of internal circuits for protection against:
• Overload
• Overtemperature
• Reverse polarity
2

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डाउनलोड[ ILE4268 Datasheet.PDF ]


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