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 Hold VQ Remarks L H H X L X X L L L OFF ON ON ON ON L H OFF 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 1 I 2 E2 3 R 4 5 GND D 6 E6 7 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 kΩ Reset Output; open-collector output internally connected to the output via a resistor of 30 kΩ 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 kΩ 5-V Output; block to GND with 22-µF capacitor, ESR < 3 Ω 2 ILE4267 Pin Configuration (top view) Block Diagram 3 ILE4267 Absolute Maximum Ratings TJ = -40 to 150°C Parameter Limit Values Symbol min. Unit Notes max. Input Voltage Vi -42 42 V - Voltage Vi - 60 V t ≤ 400 ms Current Ii - - - Limited internally Voltage VR -0.3 7 V - Current IR - - - Limited internally Voltage Vd -0.3 42 V - Current Id - - - - Voltage VQ -0.3 7 V - Current IQ - - - Limited internally Voltage VE2 -42 42 V - Current lE2 -5 5 mA Voltage VE6 -0.3 7 V Current IE6 - - mA IGND -0.5 - A - Junction temperature TJ - 150 °C - Storage temperature Tstg -50 150 °C - Reset Output Reset Delay Output Inhibit t ≤ 400 ms Hold Limited internally GND Current Temperatures 4 ILE4267 Operating Range Parameter Limit Values Symbol min. Unit Notes max. Input voltage Vi 5.5 40 V see diagram Junction temperature TJ -40 150 °C - Electrical Characteristics Vi = 13.5 V; - 40 °C < TJ < 125 °C; VE2 > 4 V (unless specified otherwise) Output voltage VQ Limit Values min. typ. max. 4.9 5 5.1 Output voltage VQ 4.9 5 5.1 Output-current limiting IQ Iq 500 - - — — Iq — Iq Parameter Symbol Unit Test Condition V 5 mA ≤ IQ ≤ 400 mA 6 V ≤ Vi ≤ 26 V V mA 5mA ≤ IQ ≤ 150 mA 6 V ≤ Vi ≤ 40 V TJ = 25 °C 50 µA Regulator-OFF 1.0 10 mA — 1.3 4 mA Iq — — 60 mA TJ = 25 °C IC turned off IQ = 5 mA IC turned on IQ = 400 mA Iq — — 80 mA VDr ∆VQ - 0.3 - 0.6 50 V mV ∆VQ — 15 25 mV Supply-voltage rejection SVR — 54 — dB - 0 - mV 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 Longterm stability ∆VQ 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 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) 5 ILE4267 Electrical Characteristics (cont’d) Limit Values Parameter Symbol min. typ. Unit Test Condition max. Reset Generator Switching threshold Vn 4.2 4.5 4.8 V - Reset High level - 4.5 - - V Rext = ∞ Saturation voltage VR - 0.1 0.4 V RR = 4.7 kΩ1) Pullup RR - 30 - kΩ - Saturation voltage VD,sat. - 50 100 mV VQ < VRT Charge current Id 8 15 25 µA VD = 1.5V Vdt 2.6 3 3.3 V - Delay td - 20 - ms Cd = 100nF Switching threshold Vst - 0.43 - V - Delay tt - 2 - µs Cd = 100nF Turn-ON voltage VE2 - 3 4 V IC turned-ON Turn-OFF voltage VE2 2 - - V IC turned-OFF Pulldown RE2 50 100 200 kΩ - Hysteresis ∆VE2 0.2 0.5 0.8 V - Input current IE2 - 35 100 µA VIP2 = 4 V Holding voltage VE6 30 35 40 % Referred to VQ Turn-OFF voltage VE6 60 70 80 % Referred to VQ Pullup RE6 20 50 100 kΩ - Turn-OFF voltage Vi, ov 42 44 46 V - Turn-ON hysteresis ∆Vi, ov 2 - 6 V - Delay switching threshold Inhibit Overvoltage Protection 1) The reset output is Low between VQ = 1 V and VRT 6 ILE4267 Test Circuit Application Circuit 7 ILE4267 Time Response 8 ILE4267 Enable and Hold Behaviour 9 ILE4267 Package Dimensions ILE4267G P-TO 220-7-180 ILE4267S P-TO 220-7-230 10