Datasheet

LM723, LM723C
SNVS765B –MAY 2004–REVISED NOVEMBER 2004 www.ti.com
Table 1. Resistor Values (kΩ) for Standard Output Voltage
Positive Applicable Fixed Output Negative Fixed 5% Output
Output Figures Output Adjustable Output Applicable Output Adjustable
Voltage ±5% ±10%
(1)
Voltage Figures ±5% ±10%
(2)
R1 R2 R1 P1 R2 R1 R2 R1 P1 R2
+3.0 1, 5, 6, 9, 12 (4) 4.12 3.01 1.8 0.5 1.2 +100 7 3.57 102 2.2 10 91
+3.6 1, 5, 6, 9, 12 (4) 3.57 3.65 1.5 0.5 1.5 +250 7 3.57 255 2.2 10 240
+5.0 1, 5, 6, 9, 12 (4) 2.15 4.99 0.75 0.5 2.2 −6
(3)
3, (10) 3.57 2.43 1.2 0.5 0.75
+6.0 1, 5, 6, 9, 12 (4) 1.15 6.04 0.5 0.5 2.7 −9 3, 10 3.48 5.36 1.2 0.5 2.0
+9.0 2, 4, (5, 6, 9, 12) 1.87 7.15 0.75 1.0 2.7 −12 3, 10 3.57 8.45 1.2 0.5 3.3
+12 2, 4, (5, 6, 9, 12) 4.87 7.15 2.0 1.0 3.0 −15 3, 10 3.65 11.5 1.2 0.5 4.3
+15 2, 4, (5, 6, 9, 12) 7.87 7.15 3.3 1.0 3.0 −28 3, 10 3.57 24.3 1.2 0.5 10
+28 2, 4, (5, 6, 9, 12) 21.0 7.15 5.6 1.0 2.0 −45 8 3.57 41.2 2.2 10 33
+45 7 3.57 48.7 2.2 10 39 −100 8 3.57 97.6 2.2 10 91
+75 7 3.57 78.7 2.2 10 68 −250 8 3.57 249 2.2 10 240
(1) Replace R1/R2 in figures with divider shown in Figure 27.
(2) Figures in parentheses may be used if R1/R2 divider is placed on opposite input of error amp.
(3) V
+
and V
CC
must be connected to a +3V or greater supply.
Table 2. Formulae for Intermediate Output Voltages
Outputs from +2 to +7 volts Outputs from +4 to +250 volts Current Limiting
(Figure 4 Figure 18 Figure 19 (Figure 21)
Figure 20 Figure 23 Figure 26
Outputs from +7 to +37 volts Outputs from −6 to −250 volts Foldback Current Limiting
(Figure 16 Figure 18 Figure 19 (Figure 17 Figure 22 Figure 24)
Figure 20 Figure 23 Figure 26)
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