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| TECHNICAL DATA 5 V Low-Drop Voltage Regulator ILE 4266-2 Features Output voltage tolerance 3 % 150 mA current capability Very low current consumption Low-drop voltage Overtemperature protection Reverse polarity proof Wide temperature range Suitable for use in automotive electronics Inhibit Package P-SOT223-4-2 The ILE 4266-2 is a monolithic integrated low-drop fixed voltage regulator which can supply loads up to 150 mA. It can be switched on and off by the INH pin. It is functional compatible to the ILE 4266, but with a reduced quiescent current of < 1 A in OFF mode and 35 A in ON mode. The ILE 4266-2 is especially designed for all applications that require very low quiescent current in ON and OFF mode. The device is available in the small surface mounted P-SOT223-4-2 package. In the P-SOT223-4-2 housing it is pin compatible to the ILE 4266G. It is designed to supply microprocessor systems under the severe condition of automotive applications and therefore it is equipped with additional protection against over load, short circuit and overtemperature. Of course the ILE 4266-2 can be used in other applications, where a stabilized voltage and the inhibit feature is required. And input voltage VI in the range of 6 V < VI < 45 V is regulated to VQ = 5 V with an accuracy of 3%. The device operates in the temperature range of Tj = - 40 to 125 C. A High level at the INH pin switches the regulator on. ILE 4266-2 P-SOT223-4-2 TA = -40 ...125C Type ILE 4266-2 G Functional Description ILE 4266-2 Pin Configuration (top view) P-SOT223-4-2 GND 4 1 2 3 INH Q Pin Definitions and Functions Pin 1 2 3 4 Symbol I INH Q GND Function Input voltage; block to ground directly at the IC with a ceramic capacitor. Inhibit input; high level turns IC on. Output voltage; block to ground with a capacitor. Ground ILE 4266-2 Block Diagram Temperature Sensor Saturation Control and Protection Circuit Q Control Amplifier Adjustment Bandgap Reference Buffer INH GND GND ILE 4266-2 Absolute Maximum Ratings Tj = - 40 to 125 C Parameter Sym bol Limit Values min. Input I Voltage Current Inhibit INH Voltage Output Q Voltage Current max. Unit Notes VI II - 42 - 45 - V - - internally limited VINH - 42 45 V - VQ IQ -1 - 32 - V - - internally limited Output Voltage Sense S Voltage Current GND Current Temperature Junction temperature Storage temperature Operating Range Input voltage Junction temperature VS IS -1 - 32 - V - - internally limited IGND 50 - mA - Tj TS - - 50 150 150 C C - - Vi Tj 5.5 - 40 45 150 V C - - ILE 4266-2 Absolute Maximum Ratings Tj = - 40 to 150 C Parameter Symbol Limit Values min. Thermal Resistance Junction ambient Junction ambient Junction case Junction case Operating Range Input voltage Junction temperature 1) Unit Notes max. Rthj-a Rthj-a Rthj-pin4 Rthj-pin5-8 - - - - 85 115 20 29 K/W K/W K/W K/W P-SOT223-4-21) P-TSOP-8-11) P-SOT223-4-2 P-TSOP-8-1 Vi Tj 5.5 - 40 45 150 V C - - Worst case, regarding peak temperature; zero airflow; mounted an a PCB 80 x 80 x 1.5 mm3, heat sink area 300 mm2. ILE 4266-2 Characteristics VI = 13.5 V; - 40 C Tj 125 C Parameter Symbol Limit Values min. typ. max. Output voltage Output-current limitation Current consumption Iq = Ii - IQ Current consumption Iq = Ii - IQ Current consumption Iq = Ii - IQ Drop voltage Load regulation Line regulation Supply-voltage rejection Output Capacitor Unit Test Condition VQ IQ Iq Iq Iq VDr VQ VQ 4.9 150 - - - - - - - 10 5 200 0 35 2 5.1 500 1 - 8 V mA A A mA V mV mV dB F 5 mA IQ 100 mA 6 V Vi 28 V - VINH = 0 V; Tj 100 C IQ = 1 mA Inhibit ON IQ = 50 mA Inhibit ON 0.25 0.5 10 10 68 - 30 40 - - IQ = 100 mA1) IQ = 1 to 100 mA Vi = 6 V VI = 6 V to 28 V IQ = 1 mA fr = 100 Hz, Vr = 0.5 VPP Low ESR tantalum or ceramic capacitor recommended CQ= 10 F CQ= 22 F SVR CQ Output Series Resistance RQ +ESR 1.5 RQ +ESR 1.0 - - 5.5 5.5 ILE 4266-2 Characteristics VI = 13.5 V; - 40 C Tj 125 C Parameter Symbol Limit Values min. typ. max. Inhibit Inhibit on voltage Inhibit off voltage Inhibit current 1) Unit Test Condition VINH, on VINH, off IINH - 0.8 - - 4 3.5 - 8 V V A - - - VINH = 5 V Drop voltage = Vi - VQ (measured when the output voltage obtained at Vi = 13.5 V). VQ has dropped 100 mV from the nominal value ILE 4266-2 Measuring Circuit Input 5.5 V to 45 V Ci Q Output ILE 4266-2 INH GND R Q = 1.5 10 F e.g. Kl. 15 Circuit Description and Application Information In the ILE 4266-2 the output voltage is divided and compared to an internal reference of 2.5 V typical. The regulation loop controls the output to achieve an output voltage of 5 V with an accuracy of 2% at an input voltage range of 5.5 V < VI < 45 V. For stability of the control loop the ILE 4266-2 output requires an output capacitor C Q of at least 10 F and an additional output resistor RQ . The resistor should be 1.5 when a 10 F capacitor is used and 1.0 for CQ 22F. The sum of RQ and the ESR of the capacitor must be kept below 5.5 . In order to achieve this the use of low-ESR tantalum or ceramic capacitors is recommended. The ILE 4266-2 can supply up to 150 mA. However for protection reasons at high input voltage above 25 V, the maximum output current is reduced (SOA protection). At the input of the regulator an input capacitor is necessary for compensating line influences. A resistor of approx. 1 in series with CI, can damp any oscillation occuring due the input inductivity and the input capacitor. The ILE 4266-2 includes the Inhibit function. For a voltage above 3.5 V at the INH pin the regulator is switched on. ILE 4266-2 Package Dimension P-SOT223-4-2 |
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