MC1723C

SEMICONDUCTOR

TECHNICAL DATA

VOLTAGE REGULATOR

ORDERING INFORMATION

Order this document by MC1723C/D

P SUFFIX

PLASTIC PACKAGE

CASE 646

D SUFFIX

PLASTIC PACKAGE

CASE 751A

(SO–14)

Device

Operating

Temperature

Range

Package

MC1723CD

MC1723CP

TA = 0° to +70°C

SO–14

Plastic DIP

Alternate

LM723CN

µA723PC

–

1

MOTOROLA ANALOG IC DEVICE DATA

Voltage Regulator

The MC1723C is a positive or negative voltage regulator designed to

deliver load current to 150 mAdc. Output current capability can be increased

to several amperes through use of one or more external pass transistors.

MC1723C is specified for operation over the commercial temperature range

(0

° to +70°C).

Figure 1. Representative Schematic Diagram

Figure 2. Typical Circuit Connection

Figure 3. Typical NPN Current Boost Connection

Noninverting

Input

Inverting

Input

VEE

4

7

5

Current

Sense

Current

Limit

Compensation

VO

6.2V

Vz

9

1.0k

25k

500

5.0pF

150

20k

300

30k

100

15k

6Vref

10

13

2

3

VCC

VC

11

12

15k

1.0k

6.2V

6.2V

5.0k

Vin

12

11

6

5

Cref

R3

(7 < VO < 37)

MC1723C

10

2

3

4

C1

100pF

13

7

RSC

R1

R2

For best results 10 k < R2 < 100 k

For minimum drift R3 = R1 | | R2

VO ^ 7ISC =

R1 + R2

R2

Vsense

0.66

RSC

VO

=

at TJ = + 25°C

Vin = 20Vdc

RSC = 0.33

VO = +15Vdc

IL = 2Adc max

12k

10k

4

C1

13

3

2

10

12

11

6

5

7

MC1723C

0.1

µF

2N3055 or Equiv

100pF

RSC

© Motorola, Inc. 1996

Rev 5