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AMS431LAL Datasheet(PDF) 3 Page - Advanced Monolithic Systems Ltd |
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AMS431LAL Datasheet(HTML) 3 Page - Advanced Monolithic Systems Ltd |
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3 / 7 page  TEST CIRCUITS V IN I REF I Z V Z = VREF V REF V IN V Z I Z V REF I REF R1 R2 V IN V Z I Z OFF Figure 1. Test Circuit for VZ=VREF Figure 2. Test Circuit for VREF vs IZ. Test circuit for IREF. Figure 3. Test Circuit for Off-State Current TYPICAL APPLICATIONS 1) Set the VOUT according to the following equation: 2) Choose the value of R as follows: • The maximum limit for R should be such that the cathode current, IZ is greater than the minimum operating current (80 µA) at V IN(min). • The minimum limit for R should b such that IZ does not exceed 100mA under all load conditions, and the instantaneous turn-on value for IZ does not exceed 150mA. Both of the following conditions must be met: R2 R1 V IN GND V REF V OUT R1 I R2 R1 1 V V REF REF OUT + + = ( )Z IN(max) min I on - turn ous instantane limit to 150mA V R ≥ ( ) conditions operating normal under I limit to 100mA I V - V R Z OUT(min) OUT IN(max) min + ≥ AMS431L Advanced Monolithic Systems http://www.ams-semitech.com 3 |
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