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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 A.
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 in series with Ci. The output capacitor is necessary for the stability of the regulating circuit. Stability is guaranteed at values of 22 F and an ESR of 3 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 L Hold X X L L L H 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 (C) to keep regulator shut off.
Inhibit: E2 Enable function, active High Hold: E6 Hold and release function, active Low
Pin Definitions and Functions
Pin 1 2 3 4 5 6 7 Symbol I E2 R GND D E6 Q Function Input; block to ground directly at the IC by a ceramic capacitor Inhibit; device is turned-ON by High signal on this pin; internal pulldown resistor of 100 k Reset Output; open-collector output internally connected to the output via a resistor of 30 k Ground; connected to rear of chip Reset Delay; connect with capacitor to GND for setting delay Hold; see truth table above for function; this input is connected to output voltage across puliup resistor of 50 k 5-V Output; block to GND with 22-F capacitor, ESR < 3
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ILE4267
Pin Configuration (top view)
Block Diagram
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ILE4267
Absolute Maximum Ratings
TJ = -40 to 150C Limit Values min. 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 TJ Tstg -50 150 150 C C IGND -0.5 A VE6 IE6 -0.3 7 V mA Limited internally VE2 lE2 -42 -5 42 5 V mA t 400 ms VQ IQ -0.3 7 V Limited internally Vd Id -0.3 42 V VR IR -0.3 7 V Limited internally Vi Vi Ii -42 42 60 V V t 400 ms Limited internally max.
Parameter
Symbol
Unit
Notes
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ILE4267
Operating Range
Parameter Input voltage Junction temperature Limit Values Symbol Vi TJ min. 5.5 -40 max. 40 150 V C see diagram Unit Notes
Electrical Characteristics Vi = 13.5 V; - 40 C < TJ < 125 C; VE2 > 4 V (unless specified otherwise)
Parameter Output voltage Output voltage Output-current limiting Current consumption Iq = Ii - IQ Current consumption Iq = Ii - IQ Current consumption Iq = Ii - IQ Current consumption Iq = Ii - IQ Current consumption Iq = Ii - I Drop voltage Load regulation Supply-voltage regulation Symbol VQ VQ IQ Iq Iq Iq Iq Iq VDr VQ VQ Limit Values min. typ. max. 4.9 5 5.1 4.9 500 -- -- -- -- -- -- -- 5 -- 1.0 1.3 -- -- 0.3 15 54 0 5.1 50 10 4 60 80 0.6 50 25 -- Unit V V mA A mA mA mA mA V mV mV dB mV Test Condition 5 mA IQ 400 mA 6 V Vi 26 V 5mA IQ 150 mA 6 V Vi 40 V TJ = 25 C Regulator-OFF TJ = 25 C IC turned off IQ = 5 mA IC turned on IQ = 400 mA IQ = 400 mA VI = 5 V IQ = 400 mA1) 5 mA . IQ 400 mA Vi = 6 to 36 V; IQ = 5 mA Fr = 100Hz; Vr = 0.5Vpp 1000 h
Supply-voltage rejection SVR Longterm stability VQ
1) Drop voltage = VI - VQ (measured when the output voltage VQ has dropped 100 mV from the nominal value obtained at VI = 13.5 V)
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ILE4267
Electrical Characteristics (cont'd)
Parameter
Reset Generator
Limit Values Symbol min. typ. max.
Unit
Test Condition
Switching threshold Reset High level Saturation voltage Pullup Saturation voltage Charge current Delay switching threshold Delay Switching threshold Delay Inhibit Turn-ON voltage Turn-OFF voltage Pulldown Hysteresis Input current Holding voltage Turn-OFF voltage Pullup Overvoltage Protection Turn-OFF voltage Turn-ON hysteresis
1)
Vn VR RR VD,sat. Id Vdt td Vst tt
4.2 4.5 8 2.6 -
4.5 0.1 30 50 15 3 20 0.43 2
4.8 0.4 100 25 3.3 -
V V V k mV A V ms V s
Rext = RR = 4.7 k1) VQ < VRT VD = 1.5V Cd = 100nF Cd = 100nF
VE2 VE2 RE2 VE2 IE2 VE6 VE6 RE6
2 50 0.2 30 60 20
3 100 0.5 35 35 70 50
4 200 0.8 100 40 80 100
V V k V A % % k
IC turned-ON IC turned-OFF VIP2 = 4 V Referred to VQ Referred to VQ -
Vi, ov Vi, ov
42 2
44 -
46 6
V V
-
The reset output is Low between VQ = 1 V and VRT
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ILE4267
Test Circuit
Application Circuit
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ILE4267
Time Response
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ILE4267
Enable and Hold Behaviour
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ILE4267
Package Dimensions ILE4267G P-TO 220-7-180
ILE4267S
P-TO 220-7-230
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