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ILE4267 Dataheets PDF



Part Number ILE4267
Manufacturers IK Semiconductor
Logo IK Semiconductor
Description 5V Low-Drop Voltage Regulator
Datasheet ILE4267 DatasheetILE4267 Datasheet (PDF)

TECHNICAL DATA 5-V Low-Drop Voltage Regulator ILE4267 ILE 4267 is a 5-V low-drop voltage regulator in a TO220-7 package. It supplies an output current of > 400 mA. The IC is shortcircuit-proof and incorporates temperature protection that disables the IC at overtemperature. Features • Output voltage tolerance ≤ ± 2 % • 400 mA output current capability • Low-drop voltage • Very low standby current consumption • Input voltage up to 40 V • Overvoltage protection up to 60 V (≤ 400 ms) • Reset fun.

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TECHNICAL DATA 5-V Low-Drop Voltage Regulator ILE4267 ILE 4267 is a 5-V low-drop voltage regulator in a TO220-7 package. It supplies an output current of > 400 mA. The IC is shortcircuit-proof and incorporates temperature protection that disables the IC at overtemperature. Features • Output voltage tolerance ≤ ± 2 % • 400 mA output current capability • Low-drop voltage • Very low standby current consumption • Input voltage up to 40 V • Overvoltage protection up to 60 V (≤ 400 ms) • Reset function down to 1 V output voltage • ESD protection up to 2000 V • Adjustable reset time • On/off logic • Overtemperature protection • Reverse polarity protection • Short-circuit proof • Wide temperature range • Suitable for use in automotive electronics Application The IC regulates an input voltage V, in the range 5.5 V < Vi < 40 V to VQrated = 5.0 V. A reset signal is generated for an output voltage VQ of < 4.5 V. The reset delay can be set with an external capacitor. The device has two logic inputs. It is turned-ON by a voltage of > 4 V on E2 by the ignition for example. It remains active as a function of the voltage on E6, even if the voltage on E2 goes Low. This makes it possible to implement a self-holding circuit without external components. When the device is turned-OFF, the output voltage drops to 0 V and current consumption tends towards 0 µA. Design Notes for External Components The input capacitor Ci is necessary for compensation line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 Ω in series with Ci. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed at values of ≥ 22 µF and an ESR of ≤ 3 Ω within the operating temperature range. 1 ILE4267 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-saturating of the power element. A comparator in the reset-generator block compares a reference that is independent of the input voltage to the scaled-down output voltage. If this reaches a value of 4.5 V, the resetdelay capacitor is discharged and then the reset output is set Low. As the output voltage increases again, the reset-delay capacitor is charged with constant current from VQ = 4.5 V onwards. When the capacitor voltage reaches the upper switching threshold, reset goes High again. The reset delay can be set within wide range by selection of the external capacitor. With the integrated tum-ON/tum-OFF logic it is simple to implement delayed tum-OFF without external components. Truth Table for Turn-ON/Turn-OFF Logic E2, Inhibit L H H X L Hold X X L L L LH VQ OFF ON ON ON ON OFF Remarks Initial state. Inhibit internally pulled up Regulator switched on via Inhibit, by ignition for example Hold clamped active to ground by controller while Inhibit is still high Previous state remains, even ignition is shut off: self-holding state Ignition shut off while regulator is in self-holding state Regulator shut down by releasing of Hold while Inhibit remains Low, final state. No active clamping required by external self-holding circuit (µC) to keep regulator shut off. Inhibit: E2 Enable function, active High Hold: E6 Hold and release function, active Low Pin Definitions and Functions Pin Symbol Function 1 I Input; block to ground directly at the IC by a ceramic capacitor 2 E2 Inhibit; device is turned-ON by High signal on this pin; internal pulldown resistor of 100 kΩ 3 R Reset Output; open-collector output internally connected to the output via a resistor of 30 kΩ 4 GND Ground; connected to rear of chip 5 D Reset Delay; connect with capacitor to GND for setting delay 6 E6 Hold; see truth table above for function; this input is connected to output voltage across puliup resistor of 50 kΩ 7 Q 5-V Output; block to GND with 22-µF capacitor, ESR < 3 Ω 2 Pin Configuration (top view) ILE4267 Block Diagram 3 ILE4267 Absolute Maximum Ratings TJ = -40 to 150°C Parameter Input Voltage Voltage Current Reset Output Voltage Current Reset Delay Voltage Current Output Voltage Current Inhibit Voltage Current Hold Voltage Current GND Current Temperatures Junction temperature Storage temperature Symbol Limit Values min. max. Vi -42 42 Vi - 60 Ii - - VR -0.3 7 IR - - Vd -0.3 42 Id - - VQ -0.3 7 IQ - - VE2 -42 42 lE2 -5 5 VE6 -0.3 7 IE6 - - IGND -0.5 - TJ - 150 Tstg -50 150 Unit Notes VV t ≤ 400 ms - Limited internally V- Limited internally V-- V- Limited internally VmA t ≤ 400 ms VmA Limited internally A- °C °C - 4 ILE4267 Operating Range Parameter Input voltage Junction temperature Limit Values Symbol min. max. Vi 5.5 40 TJ -40 150 Unit Notes V see diagram °C - Electrical Characteristics Vi = 13.5 V; - 40 °C < T.


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