SGS Thomson Microelectronics LM723, LM723N Datasheet



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

LM723

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.

BLOCK DIAGRAM

PlasticDIP-14 SO-14

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