CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.

Copyright

7-3

SEMICONDUCT OR

Description

The CA723 and CA723C are silicon monolithic integrated cir-

cuits designed for service as voltage regulators at output volt-

ages ranging from 2V to 37V at currents up to 150mA.

Each type includes a temperature-compensated reference

amplifier, an error amplifier, a power series pass transistor, and

a current-limiting circuit. They also provide independently acces-

sible inputs for adjustable current limiting and remote shutdown

and, in addition, feature low standby current drain, low tempera-

ture drift, and high ripple rejection.

The CA723 and CA723C may be used with positive and nega-

tive power supplies in a wide variety of series, shunt, switching,

and floating regulator applications. They can provide regulation

at load currents greater than 150mA and in excess of 10A with

the use of suitable n-p-n or p-n-p external pass transistors.

The CA723 and CA723C are supplied in the 10 lead TO-100

metal can(T suffix), and the 14 lead dual-in-line plastic package

(E suffix), and are direct replacements for industry types LM723,

LM723C in packages with similar terminal arrangements.

Features

• Up to 150mA Output Current

• Positive and Negative Voltage Regulation

• Regulation in Excess of 10A with Suitable Pass

Transistors

• Input and Output Short-Circuit Protection

• Load and Line Regulation . . . . . . . . . . . . . . . . . . . 0.03%

• Direct Replacement for 723 and 723C Industry Types

• Adjustable Output Voltage . . . . . . . . . . . . . . . 2V to 37V

Applications

• Series and Shunt Voltage Regulator

• Floating Regulator

• Switching Voltage Regulator

• High-Current Voltage Regulator

• Temperature Controller

Ordering Information

PART

TEMPERATURE

PACKAGE

CA723E

14Lead Plastic DIP

CA723T

10 Pin Metal Can

CA723CE

14 Lead Plastic DIP

CA723CT

10 Pin Metal Can

Pinouts

CA723 (PDIP)

TOP VIEW

CA723C (CAN)

TOP VIEW

14

13

12

11

10

9

8

7

6

5

4

3

2

1

+

VOLT

REF

AMP

ERROR

NC

V-

NON-INV

INPUT

CURRENT

SENSE

CURRENT

LIMIT

INV

INPUT

NC

NC

FREQ

COMP

INPUT

V+ UNREG

-

+

ERROR

AMP

VOLT

REF

TAB

CURRENT LIMIT

NON-INV

INPUT

INV

INPUT

CURRENT

SENSE

FREQ

COMP

V+

6

5

4

3

8

2

1

9

10

UNREG

INPUT

-

V-, (CASE INTERNALLY

CONNECTED TO TERM 5)

Functional Block Diagram

V+

VOLT

REF

AMP

+

ERROR

AMP

INVERTING

INPUT

NON-INVERTING

INPUT

TEMPERATURE-

COMPENSATED

ZENER

UNREGULATED

INPUT

FREQUENCY

COMPENSATION

CURRENT

LIMITER

CURRENT

SENSE

CURRENT

LIMIT

SERIES PASS

TRANSISTOR

V-

OUTPUT

-

April 1994

CA723, CA723C

Voltage Regulators Adjustable from 2V to 37V at Output

Currents Up to 150mA Without External Pass Transistors

File Number

788.3