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LT1020IJ Datasheet(PDF) 6 Page - Linear Technology |
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LT1020IJ Datasheet(HTML) 6 Page - Linear Technology |
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6 / 16 page  6 LT1020 sn1020 1020fcs Pins 1, 14: No Internal Connection. Pin 2: Regulator Output. Main output, requires 10 µF output capacitor. Can be shorted to VIN or ground without damaging the device. Pin 3: Input Supply. Bypass with 10 µF capacitor. Must always be more positive than ground. Pin 4: Reference. 2.5V can source or sink current. May be shorted to ground or up to 5V. Voltages in excess of 5V can damage the device. Pin 5: Comparator PNP Output. Open Collector PNP Output. Pull-up current source for the comparator. May be connected to any voltage from VIN to 36V more negative than VIN (operates below ground). Short-circuit protected. For example, if VIN is 6V then pin 5 will operate to – 30V. Pin 6: Comparator NPN Output. Open Collector NPN Output. May be connected to any voltage from ground to 36V more positive than ground (operates above VIN). Short-circuit protected. Pins 7, 8: Comparator Inputs. Operates from ground to VIN – 1V. Comparator inputs will withstand 36V even with VIN of 0V. Pin 9: Ground. Pin 10: Current Limit. Connecting this pin to ground decreases the regulator current limit to 3mA minimum. Leave open when not used. Pin 11: Feedback. This is the feedback point of the regu- lator. When operating, it is nominally at 2.5V. Optimum source resistance is 200k to 500k. The feedback pin should not be driven below ground or more positive than 5V. Pin 12: Shutdown. Turns output off. Pin 13: Dropout Detector. This pin acts like a current source from VIN which turns on when the output transistor goes into saturation. The magnitude of the current de- pends on the magnitude of the output current and the input/output voltage differential. Pin current ranges from 5 µA to about 300µA. INPUT VOLTAGE (V) 1 0 1020 G17 3 5 7 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 0 24 6 8 RL = 500Ω RL = 50Ω NO LOAD VOUT = 5V Regulator Thermal Regulation TIME (ms) 0 0.1 140 1020 G16 20 40 80 180 VIN = 15V VOUT = 5V 60 0 –0.1 0 50 100 120 160 LT1020 Turn-On Characteristic TYPICAL PERFOR A CE CHARACTERISTICS PI FU CTIO S |
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