LM723 STMicroelectronics, LM723 Datasheet - Page 11

• Manufacturer Part Number: LM723
• Description: High precision voltage regulator
• Manufacturer: STMicroelectronics

Table 6.
1. Replace R1/R2 divider with the circuit of
2. V+ must be connected to a +3 V or greater supply.
Table 7.
Figure
Figure
Voltage
Output
V
V
+100
+250
-6
-100
-250
O
+12
+15
+28
+45
+75
Outputs from 7 to 37V
-12
-15
-28
-45
Outputs from 2 to 7V
+3
+5
+6
+9
O
-9
=V
=(V
(2)
16, 19, 20, 21, 24,
17, 19, 20, 21, 24,
REF
REF
x[ (R
xR
Resistor values (kΩ) for standard output voltages
Formula for intermediate output voltages
16, 18, 20, 21, 24,
16, 18, 20, 21, 24,
16, 18, 20, 21, 24,
17, 18, 20, 21, 24,
17, 18, 20, 21, 24,
17, 18, 20, 21, 24,
17, 18, 20, 21, 24,
2
Applicable figures
) /(R
1
+R
2
1
+R
)/R
22
22
22
22
18
18
18
18
18
23
23
23
2
2
)
]
26
26
V
O
=(V
V
26
26
26
26
26
26
26
O
Outputs from -6 to -250V
=(V
Outputs from 4 to 250V
REF
Figure
Figure
REF
/2)x[ (R
/2)x[ (R
Figure 22
4.12
2.15
1.15
1.87
4.87
7.87
3.57
3.57
3.57
3.57
3.57
3.48
3.57
3.65
3.57
3.57
3.57
3.57
R
Fixed output ± 5%
18,
27.
R1
21
3
=R
2
Figure 23
-R
4
Conditions
1
1
+R
)/R
2
1
)/R
] ; R
1
3.01
4.99
6.04
7.15
7.15
7.15
7.15
48.7
78.7
2.43
5.36
8.45
11.5
24.3
21.2
97.6
102
255
249
] ;
R2
3
=R
4
I
KNEE
I
SHORTCKT
=[ (V
0.75
0.75
1.8
0.5
3.3
5.6
2.2
2.2
2.2
2.2
1.2
1.2
1.2
1.2
1.2
2.2
2.2
2.2
R1
2
Output adjustable ± 10%
O
Foldback Current Limiting
xR
=(V
I
3
LIMIT
)/(R
SENSE
Current Limit
/ (R
SC
=V
xR
SC
SENSE
/R
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
P1
10
10
10
10
10
10
10
4
xR
1
1
1
1
)] x[ V
SC
4
)x[ (R
)
/R
SC
SENSE
3
+R
x(R
(1)
0.75
4
240
240
1.2
2.2
2.7
2.7
3.3
4.3
R2
39
68
91
10
33
91
)/R
3
3
2
2
3
+R
4
11/21
]
4
)]