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LM723 Datasheet(PDF) 11 Page - STMicroelectronics |
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LM723 Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 21 page LM723 Typical performance characteristics 11/21 Table 6. Resistor values (k Ω) for standard output voltages Output Voltage Applicable figures Fixed output ± 5% Output adjustable ± 10% (1) R1 R2 R1 P1 R2 +3 16, 18, 20, 21, 24, 26 4.12 3.01 1.8 0.5 1.2 +5 16, 18, 20, 21, 24, 26 2.15 4.99 0.75 0.5 2.2 +6 16, 18, 20, 21, 24, 26 1.15 6.04 0.5 0.5 2.7 +9 17, 18, 20, 21, 24, 26 1.87 7.15 0.75 1 2.7 +12 17, 18, 20, 21, 24, 26 4.87 7.15 2 1 3 +15 17, 18, 20, 21, 24, 26 7.87 7.15 3.3 1 3 +28 17, 18, 20, 21, 24, 26 21 7.15 5.6 1 2 +45 22 3.57 48.7 2.2 10 39 +75 22 3.57 78.7 2.2 10 68 +100 22 3.57 102 2.2 10 91 +250 22 3.57 255 2.2 10 240 -6 (2) 18 3.57 2.43 1.2 0.5 0.75 -9 18 3.48 5.36 1.2 0.5 2 -12 18 3.57 8.45 1.2 0.5 3.3 -15 18 3.65 11.5 1.2 0.5 4.3 -28 18 3.57 24.3 1.2 0.5 10 -45 23 3.57 21.2 2.2 10 33 -100 23 3.57 97.6 2.2 10 91 -250 23 3.57 249 2.2 10 240 1. Replace R1/R2 divider with the circuit of Figure 27. 2. V+ must be connected to a +3 V or greater supply. Table 7. Formula for intermediate output voltages Conditions Outputs from 2 to 7V Figure 16, 19, 20, 21, 24, 26 VO=(VREFxR2) /(R1+R2) Outputs from 4 to 250V Figure 22 VO=(VREF/2)x[ (R2-R1)/R1]; R3=R4 Current Limit ILIMIT=VSENSE/RSC Outputs from 7 to 37V Figure 17, 19, 20, 21, 24, 26 VO=VREFx[ (R1+R2)/R2] Outputs from -6 to -250V Figure 18, Figure 23 VO=(VREF/2)x[ (R1+R2)/R1]; R3=R4 Foldback Current Limiting IKNEE=[(VOxR3)/(RSCxR4)] x[ VSENSEx(R3+R4)] / (RSCxR4) ISHORTCKT=(VSENSE/RSC)x[ (R3+R4)/R4] |
Similar Part No. - LM723_07 |
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Similar Description - LM723_07 |
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