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LM723
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National Semiconductor LM723, LM723C Technical data

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LM723/LM723C Voltage Regulator
LM723/LM723C Voltage Regulator
June 1999
General Description
The LM723/LM723C is a voltage regulator designed prima­rily for series regulator applications. By itself, it will supply output currentsup to 150 mA; but external transistors can be added to provide any desired load current. The circuit fea­tures extremely low standby current drain, and provision is made for either linear or foldback current limiting.
The LM723C is identical to the LM723 except that the LM723C has its performance guaranteed over a 0˚C to +70˚C temperature range, instead of −55˚C to +125˚C.
Connection Diagrams
Dual-In-Line Package
DS008563-2
Top View
Order Number LM723J/883 or LM723CN
See NS Package J14A or N14A
Features
n 150 mA output current without external pass transistor n Output currents in excess of 10A possible by adding
external transistors
n Input voltage 40V max n Output voltage adjustable from 2V to 37V n Can be used as either a linear or a switching regulator
Metal Can Package
DS008563-3
Note: Pin 5 connected to case.
Top View
Order Number LM723H, LM723H/883 or LM723CH
See NS Package H10C
© 1999 National Semiconductor Corporation DS008563 www.national.com
Connection Diagrams (Continued)
Equivalent Circuit
*
DS008563-20
Top View
Order Number LM723E/883
See NS Package E20A
*Pin numbers refer to metal can package.
Typical Application
for minimum temperature drift.
Typical Performance
Regulated Output Voltage 5V Line Regulation (∆V Load Regulation (∆I
=
3V) 0.5mV
IN
=
50 mA) 1.5mV
L
FIGURE 1. Basic Low Voltage Regulator
(V
OUT
=
2 to 7 Volts)
DS008563-4
DS008563-8
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
(Note 10) Pulse Voltage from V
Continuous Voltage from V Input-Output Voltage Differential 40V Maximum Amplifier Input Voltage
(Either Input) 8.5V
Maximum Amplifier Input Voltage
(Differential) 5V Current from V Current from V Internal Power Dissipation
Metal Can (Note 2) 800 mW
+
to V−(50 ms) 50V
+
−
to V
Z REF
40V
25 mA 15 mA
Cavity DIP (Note 2) 900 mW Molded DIP (Note 2) 660 mW
Operating Temperature Range
LM723 −55˚C to +150˚C LM723C 0˚C to +70˚C
Storage Temperature Range
Metal Can −65˚C to +150˚C Molded DIP −55˚C to +150˚C
Lead Temperature (Soldering, 4 sec. max.)
Hermetic Package 300˚C Plastic Package 260˚C
ESD Tolerance 1200V
(Human body model, 1.5 kΩ in series with 100 pF)
Electrical Characteristics (Note 3) (Note 10)
Parameter Conditions LM723 LM723C Units
Min Typ Max Min Typ Max
Line Regulation V
IN
=
12V to V
−55˚C ≤ TA≤ +125˚C 0.3 0˚C ≤ TA≤ +70˚C 0.3
=
V
12V to V
IN
Load Regulation I
=
L
1mAtoI
−55˚C ≤ TA≤ +125˚C 0.6 0˚C ≤ TA≤ +70˚C 0.6
Ripple Rejection f=50 Hz to 10 kHz, C
=
f
50 Hz to 10 kHz, C Average Temperature Coeffic- −55˚C ≤ T ient of Output Voltage (Note 8) 0˚C ≤ T Short Circuit Current Limit R
A
=
10Ω,V
SC
Reference Voltage 6.95 7.15 7.35 6.80 7.15 7.50 V Output Noise Voltage BW=100 Hz to 10 kHz, C
BW=100 Hz to 10 kHz, C Long Term Stability 0.05 0.05 Standby Current Drain I
=
0, V
L
Input Voltage Range 9.5 40 9.5 40 V Output Voltage Range 2.0 37 2.0 37 V Input-Output Voltage Differential 3.0 38 3.0 38 V
θ
JA
θ
JA
θ
JA
θ
JA
θ
JC
Note 1: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits.
Note 2: See derating curves for maximum power rating above 25˚C. Note 3: Unless otherwise specified, T
seen by error amplifier≤10 kΩ connected asshownin perature drifts must be taken into account separately for high dissipation conditions.
Note 4: L
is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 pot core or equivalent with 0.009 in. air gap.
1
Note 5: Figures in parentheses may be used if R1/R2 divider is placed on opposite input of error amp. Note 6: Replace R1/R2 in figures with divider shown in
+
Note 7: V Note 8: For metal can applications where V
and VCCmust be connected to a +3V or greater supply.
Molded DIP 105 ˚C/W
Cavity DIP 150 ˚C/W
H10C Board Mount in Still Air 165 165 ˚C/W
H10C Board Mount in 400 LF/Min Air Flow 66 66 ˚C/W
=
A
=
25˚C, V
IN
is required, an external 6.2V zener diode should be connected in series with V
Z
=
15V 0.01 0.1 0.01 0.1
IN
=
40V 0.02 0.2 0.1 0.5
IN
=
50 mA 0.03 0.15 0.03 0.2
L
=
07474dB
REF
=
5µF 86 86 dB
≤ +125˚C 0.002 0.015
A
REF
≤ +70˚C 0.003 0.015
=
06565mA
OUT
=
0 86 86 µVrms
REF
=
5 µF 2.5 2.5 µVrms
REF
=
30V 1.7 3.5 1.7 4.0 mA
IN
22 22 ˚C/W
+
=
V
Figure 1
Figure 13
V
−
=
=
=
12V, V
C
. Line and loadregulationspecifications are given forthecondition of constant chiptemperature.Tem-
0, V
OUT
.
5V, I
=
L
1 mA, R
=
=
0, C
1
100 pF, C
SC
=
0 and divider impedance as
REF
.
OUT
% % % % % % %
% %
%
/1000 hrs
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
/˚C /˚C
www.national.com3
Electrical Characteristics (Note 3) (Note 10) (Continued)
Note 9: Guaranteed by correlation to other tests. Note 10: A military RETS specification is available on request.At the time of printing, the LM723 RETS specification complied with the Min and Max limits in this
table. The LM723E, H, and J may also be procured as a Standard Military Drawing.
Typical Performance Characteristics
Load Regulation Characteristics with Current Limiting
Current Limiting Characteristics
DS008563-22
DS008563-25
Load Regulation Characteristics with Current Limiting
Current Limiting Characteristics vs Junction Temperature
DS008563-23
DS008563-26
Load & Line Regulation vs Input-Output Voltage Differential
DS008563-24
Standby Current Drain vs Input Voltage
DS008563-27
Line Transient Response
DS008563-28
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Load Transient Response
Output Impedence vs Frequency
DS008563-29
DS008563-30
Maximum Power Ratings
Noise vs Filter Capacitor (C
in Circuit of
REF
(Bandwidth 100 Hz to 10 kHz)
Figure 1
)
DS008563-31
LM723 Power Dissipation vs Ambient Temperature
DS008563-32
LM723C Power Dissipation vs Ambient Temperature
DS008563-33
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%(Note 6) Voltage Figures
±
%
5
±
%
10
(Note 5) 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 (Note 7) 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
TABLE 2. Formulae for Intermediate Output Voltages
Outputs from +2 to +7 volts Outputs from +4 to +250 volts Current Limiting
(
Figures 1, 4, 5, 6, 9, 12
(
Figure 7
)
Outputs from +7 to +37 volts Outputs from −6 to −250 volts Foldback Current Limiting
(
Figures 2, 4, 5, 6, 9, 12
)(
Figures 3, 8, 10
)
www.national.com5
Typical Applications
for minimum temperature drift. R3 may be eliminated for minimum component count.
Typical Performance
Regulated Output Voltage 15V Line Regulation (∆V Load Regulation (∆I
=
3V) 1.5 mV
IN
=
50 mA) 4.5 mV
L
DS008563-9
DS008563-11
Typical Performance
Regulated Output Voltage +15V Line Regulation (∆V Load Regulation (∆I
=
3V) 1.5 mV
IN
=
1A) 15 mV
L
FIGURE 4. Positive Voltage Regulator
(External NPN Pass Transistor)
FIGURE 2. Basic High Voltage Regulator
(V
OUT
=
7 to 37 Volts)
DS008563-10
Typical Performance
Regulated Output Voltage −15V
Line Regulation (∆V
Load Regulation (∆I
=
3V) 1 mV
IN
=
100 mA) 2 mV
L
FIGURE 3. Negative Voltage Regulator
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Typical Applications (Continued)
Regulated Output Voltage +5V Line Regulation (∆V Load Regulation (∆I
FIGURE 5. Positive Voltage Regulator
Typical Performance
=
3V) 0.5 mV
IN
=
1A) 5 mV
L
(External PNP Pass Transistor)
DS008563-12
DS008563-13
Typical Performance
Regulated Output Voltage +5V Line Regulation (∆V Load Regulation (∆I
=
3V) 0.5 mV
IN
=
10 mA) 1 mV
L
Short Circuit Current 20 mA
FIGURE 6. Foldback Current Limiting
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Typical Applications (Continued)
Regulated Output Voltage +50V Line Regulation (∆V Load Regulation (∆I
FIGURE 7. Positive Floating Regulator
Typical Performance
=
20V) 15 mV
IN
=
50 mA) 20 mV
L
DS008563-14
Typical Performance
Regulated Output Voltage −100V Line Regulation (∆V Load Regulation (∆I
=
IN
=
L
FIGURE 8. Negative Floating Regulator
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DS008563-15
20V) 30 mV
100 mA) 20 mV
Typical Applications (Continued)
Regulated Output Voltage +5V Line Regulation (∆V Load Regulation (∆I
FIGURE 9. Positive Switching Regulator
Typical Performance
=
30V) 10 mV
IN
=
2A) 80 mV
L
DS008563-16
Typical Performance
Regulated Output Voltage −15V Line Regulation (∆V Load Regulation (∆I
=
20V) 8 mV
IN
=
2A) 6 mV
L
FIGURE 10. Negative Switching Regulator
DS008563-17
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Typical Applications (Continued)
Note: Current limit transistor may be used for shutdown if current limiting is not required.
Typical Performance
Regulated Output Voltage +5V Line Regulation (∆V Load Regulation (∆I
=
3V) 0.5 mV
IN
=
50 mA) 1.5 mV
L
FIGURE 11. Remote Shutdown Regulator with Current Limiting
Regulated Output Voltage +5V Line Regulation (∆V Load Regulation (∆I
=
10V) 0.5 mV
IN
=
100 mA) 1.5 mV
L
DS008563-18
DS008563-19
FIGURE 12. Shunt Regulator
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Typical Applications (Continued)
Schematic Diagram
DS008563-21
FIGURE 13. Output Voltage Adjust
(Note 6)
DS008563-1
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Physical Dimensions inches (millimeters) unless otherwise noted
Leadless Chip Carrier Package (E)
Order Number LM723E/883
NS Package E20A
Order Number LM723H, LM723H/883 or LM723CH
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Metal Can Package (H)
NS Package H10C
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Ceramic Dual-In-Line Package (J)
Order Number LM723J/883
NS Package J14A
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
LM723/LM723C Voltage Regulator
Molded Dual-In-Line Package (N)
Order Number LM723CN
NS Package N14A
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
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2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
labeling, can be reasonably expected to result in a significant injury to the user.
National Semiconductor Corporation
Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com
www.national.com
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
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