LM723, LM723C

SNVS765C – JUNE 1999 – REVISED APRIL 2013

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Table 1. Resistor Values (k

Ω) for Standard Output Voltage

Output

5% Output

Fixed

Fixed

Positive

Negative

Applicable Figures

Adjustable

Adjustable

Applicable

Output ±5%

Output ±5%

Output

Output

±10%

Figures

Voltage

Voltage

R1

R2

R1

P1

R2

R1

R2

R1

P1

R2

Figure 4, Figure 19,

+3.0

Figure 21, Figure 24,

4.12

3.01

1.8

0.5

1.2

+100

Figure 22

3.57

102

2.2

10

91

Figure 27 (Figure 19)

Figure 4, Figure 19,

+3.6

Figure 21, Figure 24,

3.57

3.65

1.5

0.5

1.5

+250

Figure 22

3.57

255

2.2

10

240

Figure 27 (Figure 19)

Figure 4, Figure 19,

Figure 18,

+5.0

Figure 21, Figure 24,

2.15

4.99

0.75

0.5

2.2

3.57

2.43

1.2

0.5

0.75

(Figure 25)

Figure 27 (Figure 19)

Figure 4, Figure 19,

Figure 18,

+6.0

Figure 21, Figure 24,

1.15

6.04

0.5

0.5

2.7

−9

3.48

5.36

1.2

0.5

2.0

Figure 25

Figure 27 (Figure 19)

Figure 17, Figure 19,

Figure 18,

+9.0

(Figure 19, Figure 21,

1.87

7.15

0.75

1.0

2.7

−12

3.57

8.45

1.2

0.5

3.3

Figure 25

Figure 24, Figure 27)

Figure 17, Figure 19,

Figure 18,

+12

(Figure 19, Figure 21,

4.87

7.15

2.0

1.0

3.0

−15

3.65

11.5

1.2

0.5

4.3

Figure 25

Figure 24, Figure 27)

Figure 17, Figure 19,

Figure 18,

+15

(Figure 19, Figure 21,

7.87

7.15

3.3

1.0

3.0

−28

3.57

24.3

1.2

0.5

10

Figure 25

Figure 24, Figure 27)

Figure 17, Figure 19,

+28

(Figure 19, Figure 21,

21.0

7.15

5.6

1.0

2.0

−45

Figure 23

3.57

41.2

2.2

10

33

Figure 24, Figure 27)

+45

Figure 22

3.57

48.7

2.2

10

39

−100

Figure 23

3.57

97.6

2.2

10

91

+75

Figure 22

3.57

78.7

2.2

10

68

−250

Figure 23

3.57

249

2.2

10

240

(1)

Replace R1/R2 in figures with divider shown in Figure 28.

(2)

Figures in parentheses may be used if R1/R2 divider is placed on opposite input of error amp.

(3)

Table 2. Formulae for Intermediate Output Voltages

Outputs from +2 to +7 volts

Outputs from +4 to +250 volts

Current Limiting

(Figure 4 Figure 19 Figure 20

(Figure 22)

Figure 21 Figure 24 Figure 27

Outputs from +7 to +37 volts

Outputs from

−6 to −250 volts

Foldback Current Limiting

(Figure 17 Figure 19 Figure 20

(Figure 18 Figure 23 Figure 25)

Figure 21 Figure 24 Figure 27)

8

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