ST LM723 User Manual
查询LM723C供应商
HIGH PRECISION VOLTAGE REGULATOR
■ INPUTVOLTAGEUP TO 40V
■ OUTPUTVOLTAGEADJUSTABLE FROM2
TO 37V
■ POSITIVEOR NEGATIVESUPPLY
OPERATION
■ SERIES,SHUNT, SWITCHINGOR
FLOATING OPERATION
■ OUTPUTCURRENT TO150mAWITHOUT
EXTERNALPASS TRANSISTOR
■ ADJUSTABLECURRENT LIMITING
DESCRIPTION
The LM723 is a monolithic integrated
programmable voltage regulator, assembled in
14-lead dual in-line plastic and SO-14
micropackage. The circuit provides internal
current limiting. When the output current excedes
150mA an external NPN or PNP pass element
may be used.Provisions are made for adjustable
currentlimiting and remote shut-down.
LM723
PlasticDIP-14 SO-14
BLOCK DIAGRAM
September 1998
1/12
LM723
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
LM723 LM723C
DC InputVoltage 40 40 V
V
i
∆V
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Plastic DIP-14 SO-14 Unit
R
thj-amb
PINCONNECTION (top views)
Dropout Voltage 40 40 V
i-o
OutputCurrent 150 150 mA
I
o
Current fromV
I
ref
Operating Temperature -55 to 125 0 to 70
T
op
StorageTemperature -65 to 150 -65 to 150
T
stg
T
Junction Temperature 150 125
j
ref
15 25 mA
Thermal Resistance Junction-Ambient Max 200 160
o
o
C
o
C
o
C
C/W
ORDER CODES
Type Plastic DIP-14 SO-14
LM723
LM723C
LM723N
LM723CN LM723CD
TEST CIRCUIT (pin configurationrelativeto the plastic package)
2/12
Vi= 12V
V
=5V
o
I
= 1mA
o
R
1/R2
≤ 10KΩ
LM723
ELECTRICAL CHARACTERISTICS FOR LM723 (refer to the testcircuits, T
amb
=25oC,
unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
/∆ViLineRegulation Vi=12 to 15V
∆V
o
∆V
V
LoadRegulation Io= 1 to50 mA
o/Vo
Reference Voltage
REF
SVR Supply Voltage Rejection f = 100Hz to10 KHz C
/∆T OutputVoltageDrift 150 ppm/oC
∆V
o
OutputCurrent Limit
I
sc
InputVoltageRange 9.5 40 V
V
i
OutputVoltage Range 2 37 V
V
o
V
o-Vi
Quiescent Current Vi=30V Io=0mA 2.35mA
I
d
LongTerm Stability 0.1 %/1000
K
VH
OutputNoiseVoltage BW = 100 Hz to10 KHz C
e
N
=12 to 40V
V
i
=12 to 15V -55oC ≤ T
V
i
= 1 to10 mA -55oC ≤ T
I
o
=160 µA
I
ref
ref
f = 100Hz to 10KHz C
=10Ω Vo=0
R
sc
ref
BW = 100Hz to 10 KHz C
amb
amb
=0
=5µF
ref
ref
≤ 125oC
≤ 125oC
6.95 7. 15 7.35 V
338V
=0
=5 µF
0.01
0.02
0.03 0. 15
74
86
65 mA
20
2.5
0.1
0.2
0.3
0.6
%
%
%
%
%
dB
dB
hrs
µV
µV
ELECTRICAL CHARACTERISTICS FOR LM723C (refer to the testcircuits, T
amb
=25oC,
unless otherwisespecified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
/∆ViLineRegulation Vi=12 to 15V
∆V
o
∆V
V
LoadRegulation Io= 1 to50 mA
o/Vo
Reference Voltage
REF
SVR Supply VoltageRejection f = 100Hz to 10KHz C
/∆T OutputVoltageDrift 150 ppm/oC
∆V
o
OutputCurrent Limit
I
sc
InputVoltageRange 9.5 40 V
V
i
OutputVoltage Range 2 37 V
V
o
V
o-Vi
Quiescent Current Vi=30V Io=0mA 2.34mA
I
d
LongTerm Stability 0.1 %/1000
K
VH
OutputNoiseVoltage BW = 100 Hz to10 KHz C
e
N
=12 to 40V
V
i
=12 to 15V 0oC ≤ T
V
i
= 1 to10 mA 0oC ≤ T
I
o
=160 µA
I
ref
f = 100Hz to 10KHz C
=10Ω Vo=0
R
sc
amb
amb
ref
ref
BW = 100Hz to 10 KHz C
≤ 70oC
≤ 70oC
=0
=5µF
=0
ref
=5 µF
ref
6.8 7.15 7.5 V
338V
0.01
0.1
0.03 0.2
74
86
65 mA
20
2.5
0.1
0.5
0.3
0.6
%
%
%
%
%
dB
dB
hrs
µV
µV
3/12
LM723
Figure1 : Maximum OutputCurrent vs. Voltage
Drop.
Figure3 : CurrentLimitingCharacteristicsvs.
JunctionTemperature.
Figure2 : CurrentLimiting Characteristics.
Figure4 : LoadRegulationCharacteristics
without CurrentLimiting.
Figure5 : LoadRegulationCharacteristicswith
CurrentLimiting.
4/12
Figure6 : LoadRegulationCharacteristicswith
Current Limiting
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