ST LM123, LM223, LM323 User Manual

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LM123/LM223

LM323

THREE-TERMINAL 3A-5V POSITIVE VOLTAGE REGULATORS

.OUTPUT CURRENT : 3A

.INTERNAL CURRENT AND THERMAL LIMI-

TING

.TYPICALOUPUT IMPEDANCE : 0.01Ω

.MINIMUMINPUT VOLTAGE: 7.5V

.POWER DISSIPATION : 30W

TO-3

DESCRI PTIO N

The LM123, LM223,LM323arethree-terminalposi­tive voltageregulators with a preset 5V output and
a load driving capability of 3A. New circuit design
and processing techniques areused to provide the
highoutputcurrent withoutsacrificing theregulation
characteristics of lower current devices.

The 3A regulator is virtually blowout proof.
Current limiting, power limiting and thermal shut-

down provide the same high level of reliability ob­tainedwith thesetechniques in theLM209, 1Aregu­lator.

An overallworstcasespecification for thecombined
effects of input voltage, load current, ambient tem­perature, and power dissipation ensure that the
LM123,LM223,LM323 will performsatisfactorily as
a system element.

ORDER CODES

Part Number Temperature

LM123 -55
LM223 -25
LM323 0

TO-220

Package

Range

o

C to 150oC •

o

C to 150oC •

o

C to 125oC ••

KT

PIN CONNEC T ION

(bot t om view)

March1993

TO-3

1 - Input
2 - Output

TO-220

(front view)

1 - Input
2 - Output
3 - GND

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LM123-LM223-LM323

ABSOLU TE MAXIMU M RAT ING

Symbol Parameter Value Unit

V

Input Voltage 20 V

I

I

Output Current Internally Limited

O

P

Power Dissipation Internally Limited

tot

T

THERMA L CHA R ACTE R ISTI CS

Symbol Parameter Typ. Max. Unit

R

R

SCHEM ATIC D IA G RA M

Operating Junction Temperature Range LM123 -55 to 150

oper

LM223 -25 to 150
LM323 0 to 125

T

Storage Temperature Range -65 to 150

stg

Junction-case Thermal Resistance TO-3 2

thj-case

TO-220 3

Junction-ambient Thermal Resistance TO-3 35

thj-amb

TO-220 50

o

o

o

C

o

C

C/W

C/W

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Case VI VO GND

TO-3 1 2 Case

TO-220 1 2 3

LM123-LM223-LM323

ELECTRIC AL CH A RAC TERI SI C S
LM123: -55oC<Tj<150oC
LM223: -25oC<Tj<150oC
LM323: 0oC<Tj<150oC

Symbol Parameter LM123/LM223 LM323 Unit

Min. Typ. Max. Min. Typ. Max.

V

Output Voltage Range (Note 2)

O

T

=25oC, VI= 7.5 V, IO=0

amb

V

Output Voltage Range (Note 2)

O

T

min

≤ Tj≤ T

max

,P≤P

max

7.5 V ≤ VI≤ 15 V, 0≤ IO≤ 3A

K

Line Regulation (Note 3)

VI

Tj=25oC, 7.5 V ≤ VI≤ 15V

K

Load Regulation (Note 3)

VO

Tj=25oC, VI= 7.5 V, 0 ≤ IO≤ 3A

I

Quiescent Current

IB

7.5 V ≤ V

V

Output Noise Voltage

NO

T

amb

I

Short Circuit Current Limit (Tj=25oC)

OS

≤ 15 V, 0≤ IO≤ 3A

I

=25oC, 10 Hz ≤ f ≤ 100 KHz

VI=15V
VI= 7.5V

K

Notes : 1. Although power dissipation is internally limited, specifications apply only for P ≤ 30W.

Long Term Stability 35 35 mV

VH

2. Selected devices with tightened tolerance output voltage available.

3. Load and line regulation are specified at constant junction temperature. Pulse testing is required with a pulse width
≤ 1ms and a duty cycle ≤ 5%.

4.7 5 5.3 4.8 5 5.2 V

4.6 5.4 4.75 5.25 V

5 25 5 25 mV

25 100 25 100 mV

12 20 12 20 mA

40 40 µV

3

4.5

4

5

3

4.5

4

5

rms

A
A

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LM123-LM223-LM323

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LM123-LM223-LM323

TYPICAL APPLI CA TIONS

BASIC3A REGULATOR TRIMINGOUTPUT TO5V

C1= R equire d if regulator is distant from filter

capacito rs.

CL= R egulator is stable w ith no load capacitor into

resistive loads.

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LM123-LM223-LM323

10A REGULA TO R WITH COMPLETE OVERLO AD PROTECTION

*

Selected for20mA currentfrom unregulated negative supply.

**

Solidtantalum.

A = LM101A, LM201A, LM301A.

ADJUSTABLE REGULATOR 0 – 10V/3A

A1 = LM 101 A, LM 201 A, LM 301 A.
C1 = 2µF optional - improves ripple rejection, noise and transient response.

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TO-3 MECHANICAL DATA

LM123-LM223-LM323

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 11.00 13.10 0.433 0.516

B 0.97 1.15 0.038 0.045

C 1.50 1.65 0.059 0.065

D 8.32 8.92 0.327 0.351

E 19.00 20.00 0.748 0.787

G 10.70 11.10 0.421 0.437

N 16.50 17.20 0.649 0.677

P 25.00 26.00 0.984 1.023

R 4.00 4.09 0.157 0.161

U 38.50 39.30 1.515 1.547

V 30.00 30.30 1.187 1.193

P

G

U

V

N

O

R

B

A

D

C

E

P003F

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LM123-LM223-LM323

TO-220 MECHANICAL DATA

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107

D1 1.27 0.050

E 0.49 0.70 0.019 0.027

F 0.61 0.88 0.024 0.034

F1 1.14 1.70 0.044 0.067
F2 1.14 1.70 0.044 0.067

G 4.95 5.15 0.194 0.203

G1 2.4 2.7 0.094 0.106
H2 10.0 10.40 0.393 0.409

L2 16.4 0.645
L4 13.0 14.0 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.2 15.9 0.598 0.625
L7 6.2 6.6 0.244 0.260
L9 3.5 4.2 0.137 0.165

DIA. 3.75 3.85 0.147 0.151

E

A

L4

D

F2

F1

G1

H2

G

F

C

D1

L2

Dia.

L5

L7

L6

L9

P011C

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LM123-LM223-LM323

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of useof such information nor forany infringement of patents or other rights of third parties which may results from its use. No
license isgranted by implication or otherwise underany patent or patent rights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to changewithout notice. This publication supersedes andreplaces all informationpreviously supplied.
SGS-THOMSON Microelectronicsproductsare not authorized foruse ascritical componentsin life support devices or systemswithout express
written approval of SGS-THOMSON Microelectonics.

 1994 SGS-THOMSON Microelectronics- All RightsReserved

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