TECHNICAL DATA 5-V Low-Drop Fixed-Voltage Regulator ILE4264G ILE 4264 G is a 5-V low-drop fixed-voltage regulator in an SOT-223 package. The IC regulates an input voltage VI in the range 5.5 V < VI < 45 V to VQrated = 5.0 V. The maximum output current is more than 120 mA. This IC is shortcircuit-proof and features temperature protection that disables the circuit at overtemperature. Features: Output voltage tolerance ≤ ± 2 % Low-drop voltage Very low current consumption Overtemperature protection Short-circuit proof Suitable for use in automotive electronics Reverse polarity. ILE 4264G P-SOT223-4-1 Dimensioning Information on External Components The input capacitor Ci is necessary for compensating line influences. Using a resistor of approx. 1 Ω in series with Ci, the oscillating of input inductivity and input capacitance can be clamped. The output capacitor CQ is necessary for the stability of the regulating circuit. Stability is guaranteed at values CQ ≥ 10µF and an ESR ≤ 10Ω within the operating temperature range. Pin Definitions and Functions Pin 1 Symbol 2, 4 3 GND VI VQ Function Input voltage; block to ground directly on IC with ceramic capacitor Ground 5-V output voltage; block to ground with ≥ 10-µF Ω capacitor, ESR < 10 Ω Circuit Description The control amplifier compares a reference voltage, which is kept highly precise 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, working as a function of load current, prevents any over-saturation of the power element. The IC is additionally protected against overload, overtemperature and reverse polarity. 1 ILE4264G Pin Configuration (top view) Absolute Maximum Ratings Tj = – 40 to 150 °C Parameter Limit Values Symbol min. Unit max Notes Input Input voltage VI –42 45 V – Input current II – – – limited internally Output voltage VQ –1 16 V – Output current IQ – – – limited internally IGND 50 – mA – Junction temperature Tj – 150 °C – Storage temperature Tstg –50 150 °C – Input voltage VI 5.5 45 V – Junction temperature Tj –40 150 °C – System-air Rth SA – 100 K/W soldered in System-case Rth SC – 25 K/W – Output Ground Current Temperatures Operating Range Thermal Resistances 2 ILE4264G Block Diagram Characteristics VI = 13.5 V; – 40 °C ≤ Tj ≤ 125 °C, unless specified otherwise Limit Values Parameter Output voltage Symbol VQ min 4.9 Typ 5.0 Unit Max 5.1 V Test Condition 5 mA ≤ IQ ≤ 100 mA 6 V≤ VI ≤ 28 V Output-current limiting IQ 120 150 – mA – Current consumption Iq = II – IQ Iq – – 400 µA IQ = 1 mA Current consumption Iq = II – IQ Iq – 10 15 mA IQ = 100 mA Drop voltage Vdr – 0.25 0.5 V IQ = 100 mA1) Load regulation ∆VQ – – 40 mV IQ = 5 to 100 mA VI = 6 V Supply-voltage regulation ∆VQ – 15 30 mV VI = 6 to 28 V IQ = 5 mA Supply voltage suppression SVR – 54 – dB fr = 100 Hz Vr = 0.5 Vpp 3 ILE4264G Application Circuit 4 ILE4264G 5 ILE4264G Package Dimensions P-SOT 223-4-1 6