LM431 National Semiconductor, LM431 Datasheet
LM431
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LM431 Summary of contents
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... Adjustable Precision Zener Shunt Regulator General Description The LM431 is a 3-terminal adjustable shunt regulator with guaranteed temperature stability over the entire temperature range of operation. The output voltage may be set at any level greater than 2. 36V merely by selecting two REF external resistors that act as a voltage divided network. Due to the sharp turn-on characteristics this device is an excellent replacement for many zener diode applications ...
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... Symbol and Functional Diagrams 1005599 www.national.com 1% 2% LM431BCZ/ LM431ACZ/ LM431BCZ LM431ACZ LM431BIZ/ LM431AIZ/ LM431BIZ LM431AIZ LM431BCM/ LM431ACM/ 431BCM LM431ACM LM431BCMX/ LM431ACMX/ 431BCM LM431ACM LM431BIM/ LM431AIM/ 431BIM LM431AIM LM431BIMX/ LM431AIMX/ 431BIM LM431AIM LM431BCM3/ LM431ACM3/ N1D N1F LM431BCM3X/ LM431ACM3X/ N1D N1F LM431BIM3 LM431AIM3 N1C N1E LM431BIM3X ...
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DC Test Circuits FIGURE 1. Test Circuit for V 1005504 Note REF 1005506 FIGURE 3. Test Circuit for Off-State Current 3 1005505 (1 + R1/R2 • R1 REF REF FIGURE 2. ...
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... Z REF V = 36V REF (Note LM431A, Z REF Frequency = 0 Hz (Figure LM431B, LM431C Z REF Frequency = 0 Hz (Figure defined as the maximum variation of the reference input voltage over the full temperature range. DEV 4 Min V REF 1.0 mA Min Typ Max 2.440 2.495 2.550 2.470 2 ...
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The average temperature coefficient of the reference input voltage, V Where: T − full temperature change (0-70°C can be positive or negative depending on whether the slope is positive or negative. REF Example ...
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Typical Performance Characteristics Input Current vs V Input Current vs V Stability Boundary Conditions Note: The areas under the curves represent conditions that may cause the de- vice to oscillate. For curves B, C, and D, R2 and V the ...
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Test Circuit for Curve A Above Typical Applications Test Circuit for Curves B, C and D Above 1005512 Shunt Regulator Single Supply Comparator with Temperature Compensated Threshold 1005515 7 1005513 1005514 www.national.com ...
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Series Regulator Output Control of a Three Terminal Fixed Regulator 1005517 Higher Current Shunt Regulator 1005518 8 1005516 ...
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Crow Bar 1005519 Over Voltage/Under Voltage Protection Circuit 9 1005520 www.national.com ...
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Voltage Monitor Delay Timer 1005522 Current Limiter or Current Source 10 1005521 1005523 ...
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Constant Current Sink 1005524 11 www.national.com ...
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Physical Dimensions SOT-23 Molded Small Outline Transistor Package (M3) www.national.com inches (millimeters) unless otherwise noted 8-Pin SOIC NS Package Number M08A NS Package Number MF03A 12 ...
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NS Package Number Z03A 13 www.national.com ...
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