Voltage Regulator. LM723CN Datasheet

LM723CN Regulator. Datasheet pdf. Equivalent

LM723CN Datasheet
Recommendation LM723CN Datasheet
Part LM723CN
Description Voltage Regulator
Feature LM723CN; LM723/LM723C Voltage Regulator June 1999 LM723/LM723C Voltage Regulator General Description The L.
Manufacture National Semiconductor
Datasheet
Download LM723CN Datasheet




National Semiconductor LM723CN
June 1999
LM723/LM723C
Voltage Regulator
General Description
The LM723/LM723C is a voltage regulator designed prima-
rily for series regulator applications. By itself, it will supply
output currents up to 150 mA; but external transistors can be
added to provide any desired load current. The circuit fea-
tures extremely low standby current drain, and provision is
made for either linear or foldback current limiting.
The LM723/LM723C is also useful in a wide range of other
applications such as a shunt regulator, a current regulator or
a temperature controller.
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.
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
Connection Diagrams
Dual-In-Line Package
Metal Can Package
DS008563-2
Top View
Order Number LM723J/883 or LM723CN
See NS Package J14A or N14A
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
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National Semiconductor LM723CN
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
DS008563-4
DS008563-8
for minimum temperature drift.
Typical Performance
Regulated Output Voltage
Line Regulation (VIN = 3V)
Load Regulation (IL = 50 mA)
5V
0.5mV
1.5mV
FIGURE 1. Basic Low Voltage Regulator
(VOUT = 2 to 7 Volts)
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National Semiconductor LM723CN
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+ to V(50 ms)
Continuous Voltage from V+ to V
Input-Output Voltage Differential
Maximum Amplifier Input Voltage
(Either Input)
Maximum Amplifier Input Voltage
(Differential)
Current from VZ
Current from VREF
Internal Power Dissipation
Metal Can (Note 2)
50V
40V
40V
8.5V
5V
25 mA
15 mA
800 mW
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 kin series with 100 pF)
Electrical Characteristics (Note 3) (Note 10)
Parameter
Conditions
LM723
LM723C
Units
Min Typ Max Min Typ Max
Line Regulation
Load Regulation
Ripple Rejection
Average Temperature Coeffic-
ient of Output Voltage (Note 8)
Short Circuit Current Limit
Reference Voltage
VIN = 12V to VIN = 15V
−55˚C TA +125˚C
0˚C TA +70˚C
VIN = 12V to VIN = 40V
IL = 1 mA to IL = 50 mA
−55˚C TA +125˚C
0˚C TA +70˚C
f = 50 Hz to 10 kHz, CREF = 0
f = 50 Hz to 10 kHz, CREF = 5 µF
−55˚C TA +125˚C
0˚C TA +70˚C
RSC = 10, VOUT = 0
0.01 0.1
0.01 0.1
0.3
0.3
0.02 0.2
0.1 0.5
0.03 0.15
0.03 0.2
0.6
0.6
74
74
86
86
0.002 0.015
0.003 0.015
65
65
6.95 7.15 7.35 6.80 7.15 7.50
% VOUT
% VOUT
% VOUT
% VOUT
% VOUT
% VOUT
% VOUT
dB
dB
%/˚C
%/˚C
mA
V
Output Noise Voltage
Long Term Stability
BW = 100 Hz to 10 kHz, CREF = 0
BW = 100 Hz to 10 kHz, CREF = 5 µF
86
2.5
0.05
86
µVrms
2.5
µVrms
0.05
%/1000 hrs
Standby Current Drain
Input Voltage Range
IL = 0, VIN = 30V
1.7 3.5
1.7 4.0
mA
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
θJA
Molded DIP
105
˚C/W
θJA
Cavity DIP
150
˚C/W
θJA
H10C Board Mount in Still Air
165
165
˚C/W
θJA
H10C Board Mount in 400 LF/Min Air Flow
66
66
˚C/W
θJC
22
22
˚C/W
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, TA = 25˚C, VIN = V+ = VC = 12V, V= 0, VOUT = 5V, IL = 1 mA, RSC = 0, C1 = 100 pF, CREF = 0 and divider impedance as
seen by error amplifier 10 kconnected as shown in Figure 1. Line and load regulation specifications are given for the condition of constant chip temperature. Tem-
perature drifts must be taken into account separately for high dissipation conditions.
Note 4: L1 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.
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 Figure 13.
Note 7: V+ and VCC must be connected to a +3V or greater supply.
Note 8: For metal can applications where VZ is required, an external 6.2V zener diode should be connected in series with VOUT.
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