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APL1431LBBC-TB Datasheet(PDF) 4 Page - Anpec Electronics Coropration |
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APL1431LBBC-TB Datasheet(HTML) 4 Page - Anpec Electronics Coropration |
4 / 10 page Copyright ANPEC Electronics Corp. Rev. A.4 - May., 2003 APL1431L www.anpec.com.tw 4 Notes for Application Circuits: 1) To improve the stability of output voltage , a 0.1 µF capacitor between cathode and anode of APL431L is strongly recommended. 2) Set V O according to the following equation: V O= VREF (1+R1/ R2)+ IREF R1 3) Choose the value for R B as follows: • The maximum limit for R B should be such that the cathode current( IK) is greater than the minimum operating current (60 µA) at V IN (MIN) . • The minimum limit for R B should be such that the cathode current (IK) does not exceed 100mA under all load conditions, and the instantaneous turn-on value for I K does not exceed 150mA . Both of the following conditions must be met : R B,MIN ≥ VIN(MAX) / 150mA ( to limit instantaneous turn-on IK) R B,MIN ≥ VIN(MAX) - VO / IO (MIN) + 100mA (to limit I K under normal operating conditions) Application Schematic Precision Voltage Reference Precision Voltage Regulator V O V IN APL431L R B R 1 R 2 GND V REF 0.1 µF V O V IN APL431L R B R 1 R 2 V REF 0.1 µF |
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