Voltage Regulator CA723

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

Copyright © Harris Corporation 19947-3

S E M I C O N D U C T O R

DescriptionThe 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 referenceamplifier, an error amplifier, a power series pass transistor, anda current-limiting circuit. They also provide independently acces-sible inputs for adjustable current limiting and remote shutdownand, 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 regulationat load currents greater than 150mA and in excess of 10A withthe use of suitable n-p-n or p-n-p external pass transistors.

The CA723 and CA723C are supplied in the 10 lead TO-100metal 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 InformationPART TEMPERATURE PACKAGE

CA723E -55oC to +125oC 14Lead Plastic DIP

CA723T -55oC to +125oC 10 Pin Metal Can

CA723CE 0oC to +70oC 14 Lead Plastic DIP

CA723CT 0oC to +70oC 10 Pin Metal Can

PinoutsCA723 (PDIP)

TOP VIEW

CA723C (CAN)TOP VIEW

14

13

12

11

10

9

87

6

5

4

3

2

1

+

VOLTREF

AMPERROR

NC

V-

NON-INVINPUT

VREF

CURRENTSENSE

CURRENTLIMIT

INVINPUT VC

VO

VZ

NC

NC

FREQCOMP

INPUTV+ UNREG

-

+ERRORAMP

VOLTREF

TABCURRENT LIMIT

NON-INVINPUT

INVINPUT

CURRENTSENSE

FREQCOMP

V+

65

4

3

VREF VO

7 VC

82

1 910

UNREGINPUT

-

V-, (CASE INTERNALLYCONNECTED TO TERM 5)

Functional Block Diagram

V+

VOLTREFAMP +

ERRORAMP

INVERTINGINPUT

NON-INVERTINGINPUT

TEMPERATURE-COMPENSATEDZENER

UNREGULATEDINPUT

FREQUENCYCOMPENSATION

CURRENTLIMITER

CURRENTSENSE

CURRENTLIMIT

SERIES PASSTRANSISTOR

V-

VZ

OUTPUTVO REGULATED

VC

VREF -

April 1994

CA723, CA723CVoltage Regulators Adjustable from 2V to 37V at Output

Currents Up to 150mA Without External Pass Transistors

File Number 788.3

7-4

Specifications CA723, CA723C

Absolute Maximum Ratings Operating ConditionsDC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

(Between V+ and V- Terminals)Pulse Voltage for 50ms

Pulse Width (Between V+ and V- Terminals) . . . . . . . . . . . . . 50VDifferential Input-Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . 40VDifferential Input Voltage

Between Inverting and Noninverting Inputs . . . . . . . . . . . . . . . . ±5VBetween Noninverting Input and V- . . . . . . . . . . . . . . . . . . . . . 8V

Current From Zener Diode Terminal (VZ) . . . . . . . . . . . . . . . . . 25mA

Thermal Resistance θJA θJCPlastic DIP Package . . . . . . . . . . . . . . . . 120oC/W -Metal Can . . . . . . . . . . . . . . . . . . . . . . . . 136oC/W 65oC/W

Device DissipationCA723T, CA723CT, Up to TA = +25oC. . . . . . . . . . . . . . . . 900mWCA723E, CA723CE, Up to TA = +25oC . . . . . . . . . . . . . . 1000mWCA723T, CA723CT, Above TA = +25oC. . . . . . . . . . . . . 7.4mW/oCCA723E, CA723CE, Above TA = +25oC . . . . . . . . . . . . 8.3mW/oC

Ambient Temperature RangeOperating Temperature Range . . . . . . . . . . . . . . -55oC to +125oCStorage Temperature Range . . . . . . . . . . . . . . . . -65oC to +150oC

Lead Temperature, During Soldering . . . . . . . . . . . . . . . . . . +265oCAt a distance 1/16” ± 1/32” (1.59mm ± 0.79mm) from case for 10smax

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationof the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

DC Electrical Specifications TA = +25oC, V+ = VC = VI = 12V, V- = 0, VO = 5V, IL = 1mA, C1 = 100pF, CREF = 0, RSCP = 0,

Unless Otherwise Specified. Divider impedance R1 R2 ÷ R1 + R2 at noninverting input, Terminal 5 =

10kΩ. (Figure 20)

PARAMETERS TEST CONDITION

CA723 CA723C

UNITSMIN TYP MAX MIN TYP MAX

DC CHARACTERISTICS

Quiescent Regulator Current, IQ IL = 0, VI = 30V - 2.3 3.5 - 2.3 4 mA

Input Voltage Range, VI 9.5 - 40 9.5 - 40 V

Output Voltage Range, VO 2 - 37 2 - 37 V

Differential Input-Output Voltage, VI - VO 3 - 38 3 - 38 V

Reference Voltage, VREF 6.95 7.15 7.35 6.8 7.15 7.5 V

Line Regulation (Note 1) VI = 12V to 40V - 0.02 0.2 - 0.1 0.5 % VO

VI = 12V to 15V - 0.01 0.1 - 0.01 0.1 % VO

VI = 12V to 15V,TA = -55oC to +125oC

- - 0.3 - - - % VO

VI = 12V to 15V,TA = 0oC to +70oC

- - - - - 0.3 % VO

Load Regulation (Note 1) IL = 1mA to 50mA - 0.03 0.15 - 0.03 0.2 % VO

IL = 1mA to 50mA,TA = -55oC to +125oC

- - 0.6 - - - % VO

IL = 1mA to 50mA,TA = 0oC to +70oC

- - - - - 0.6 % VO

Output-Voltage Temperature Coeffi-cient, ∆VO

TA = -55oC to +125oC - 0.002 0.015 - - - %/oC

TA = 0oC to +70oC - - - - 0.003 0.015 %/oC

Ripple Rejection (Note 2) f = 50Hz to 10kHz - 74 - - 74 - dB

f = 50Hz to 10kHz,CREF = 5µF

- 86 - - 86 - dB

Short Circuit Limiting Current, ILIM RSCP = 10Ω, VO = 0 - 65 - - 65 - mA

Equivalent Noise RMS Output Voltage,VN (Note 2)

BW = 100Hz to 10kHz,CREF = 0

- -20 - - 20 - µV

BW = 100Hz to 10kHz,CREF = 5µF

- 2.5 - - 2.5 - µV

NOTES:

1. Line and load regulation specifications are given for condition of a constant chip temperature. For high dissipation condition, temperaturedrifts must be separately taken into account.

2. For CREF (See Figure 20)

7-5

CA723, CA723C

FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C

Typical Performance Curves (CA723)

FIGURE 2. MAX LOAD CURRENT vs DIFFERENTIAL INPUT-OUTPUT VOLTAGE

FIGURE 3. LOAD REGULATION WITHOUT CURRENT LIMIT-ING

FIGURE 4. LOAD REGULATION WITH CURRENT LIMITING FIGURE 5. LOAD REGULATION WITH CURRENT LIMITING

V+

UNREGULATEDINPUT

D16.2V

R215kΩ

R1500Ω

R325kΩ

D3Q3

Q4

Q5

Q1

Q6

C15pF

R730kΩ R8

5kΩ

D26.2V

VREF

R6100Ω

Q10

R9300Ω

R1020kΩ

Q9

Q7

R41kΩ

R51kΩ

Q8

Q14

Q15

Q11 Q12

R11150Ω

Q13

Q16

R1215kΩ

D4VZ

FREQUENCYCOMPENSATION

VO

VC

CURRENTLIMIT

CURRENTSENSE

NON-INVERTINGINPUT

V- INVERTINGINPUT

MAX JUNCTION TEMP (TJ) = +150oCTHERMAL RESISTANCE = 150oC/WQUIESCENT DISSIPATION (PQ) = 60mW(NO HEAT SINK)

150

100

50

0

MA

XIM

UM

LO

AD

CU

RR

EN

T (

mA

)

AMBIENT TEMPERATURE (TA) = +25oC

+125oC

0 10 20 30 40DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)

OUTPUT VOLTAGE (VO) = 5V

SHORT CIRCUIT PROTECTIONRESISTANCE (RSCP) = 0

INPUT VOLTAGE (VI) = 12VL

OA

D R

EG

UL

AT

ION

(V

O)

0.05

0

-0.05

-0.1

-0.15

-0.2

AMBIENT TEMPERATURE

-55oC

+125oC

0 20 40 60 80 100OUTPUT CURRENT (mA)

(TA) = +25oC


SHORT CIRCUIT PROTECTIONRESISTANCE (RSCP) = 10Ω

INPUT VOLTAGE (VI) = 12V

-55oC

+125oC

0.05

0

-0.05

-0.1

-0.15

-0.2

-0.25

LO

AD

RE

GU

LA

TIO

N (V

O)

OUTPUT CURRENT (mA)

0 5 10 15 20 25 30

AMBIENT TEMP (TA) = +25oC

OUTPUT CURRENT (mA)



INPUT VOLTAGE (VI) = 12V0.1

0

-0.1

0.2

-0.3

-0.40 20 40 60 80 100

AMBIENT TEMPERATURE (TA) = -55oC

+25oC

+125oC

LO

AD

RE

GU

LA

TIO

N (

VO

)

7-6

CA723, CA723C

FIGURE 6. CURRENT LIMITING CHARACTERISTICS FIGURE 7. QUIESCENT CURRENT vs INPUT VOLTAGE

FIGURE 8. MAX LOAD CURRENT vs DIFFERENTIAL INPUT-OUTPUT VOLTAGE

FIGURE 9. MAX LOAD CURRENT vs DIFFERENTIAL INPUT-OUTPUT VOLTAGE FOR CA723CE

FIGURE 10. LOAD REGULATION WITHOUT CURRENT LIMIT-ING

FIGURE 11. LOAD REGULATION WITH CURRENT LIMITING

Typical Performance Curves (CA723) (Continued)

OU

TP

UT

VO

LT

AG

E (

VO

) =

5V

SH

OR

T C

IRC

UIT

PR

OT

EC

TIO

NR

ES

IST

AN

CE

(R

SC

P)

= 10

Ω

INP

UT

VO

LT

AG

E (

VI)

= 12

V

AM

BIE

NT

TE

MP

ER

AT

UR

E (

T A)

= -5

5oC

+125

oC

+25o

C

OU

TP

UT

VO

LT

AG

E (

V)

OUTPUT CURRENT (mA)

1.2

1.0

0.8

0.6

0.4

0.2

020 40 60 80 1000

OUTPUT VOLTAGE (VO) = REFERENCE

LOAD CIRCUIT (IL) = 0VOLTAGE (VREF)

QU

IES

CE

NT

CU

RR

EN

T (

mA

)

INPUT VOLTAGE (V)

5

4

3

2

1

00 10 20 30 40

AMBIENT TEMPERATURE (TA) = -55oC

+25oC

+125oC

MAX. JUNCTION TEMP. (TJ) = +150oC

QUIESCENT DISSIPATION (PQ) = 60mWTO-5 STYLE PACKAGE WITH NO HEAT SINK

THERMAL RESISTANCE = 150oC/W


+70oC

150

100

50

0

MA

XIM

UM

LO

AD

CU

RR

EN

T (

mA

)

0 10 20 30 40DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)

150

100

50

00 10 20 30 40

DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)

MA

XIM

UM

LO

AD

CU

RR

EN

T (m

A)

+70oC


MAX. JUNCTION TEMP. (TJ) = +125oC

QUIESCENT DISSIPATION (PQ) = 60mWDUAL - IN - LINE PLASTIC PACKAGE

THERMAL RESISTANCE = 125oC/W

WITH NO HEAT SINK


+70oC

0oC




LO

AD

RE

GU

LA

TIO

N (

VO

)

0

-0.1

-0.20 20 40 60 80 100

OUTPUT CURRENT (mA)


+70oC

0oC


SHORT CIRCUIT PROTECTIONRESISTANCE (RSCP) = 10Ω


0

-0.1

-0.2

LO

AD

RE

GU

LA

TIO

N (

VO

)

OUTPUT CURRENT (mA)0 10 20 30

7-7

CA723, CA723C

FIGURE 12. CURRENT LIMITING CHARACTERISTICS FIGURE 13. QUIESCENT CURRENT vs INPUT VOLTAGE

Typical Performance Curves (CA723 and CA723C)

FIGURE 14. LOAD REGULATION vs DIFFERENTIAL INPUT-OUTPUT VOLTAGE

FIGURE 15. LINE REGULATION vs DIFFERENTIAL INPUT-OUTPUT VOLTAGE

FIGURE 16. LINE TRANSIENT RESPONSE FIGURE 17. CURRENT LIMITING CHARACTERISTIC vs JUNC-TION TEMPERATURE

Typical Performance Curves (CA723) (Continued)

OU

TP

UT

VO

LT

AG

E (

V)

OUTPUT CURRENT (mA)

1.2

1.0

0.8

0.6

0.4

0.2

00 60402010 80 100

OU

TP

UT

VO

LT

AG

E (

VO

) =

5V

SH

OR

T C

IRC

UIT

PR

OT

EC

TIO

NR

ES

IST

AN

CE

(R

SC

P)

= 10

INP

UT

VO

LT

AG

E (

VI)

= 12

V


+70oC 0oC

OUTPUT VOLTAGE (VO) = REFERENCE

LOAD CURRENT (IL) = 0VOLTAGE (VREF)


0oC

+70oC

QU

IES

CE

NT

CU

RR

EN

T (

mA

)

INPUT VOLTAGE (V)0 10 20 30 40

1

2

3

4

5

0


LOAD CURRENT (IL) = I TO 50mAOUTPUT VOLTAGE (VO) = 5V

AMBIENT TEMPERATURE (TA) = +25oCSHORT CIRCUIT PROTECTION

RESISTANCE (RSCP) = 0

0.2

0.1

0

-0.1

-0.2

-0.3-5 5 15 25 35 45

LO

AD

RE

GU

LA

TIO

N (

VO

)


0.3

0.2

0.1

0

-0.1

-0.2

OUTPUT VOLTAGE (VO) = 5VLOAD CURRENT (IL) = 1mAAMBIENT TEMPERATURE (TA) = +25oCDIFFERENTIAL INPUT VOLTAGE (∆VT) = 3VSHORT CIRCUIT PROTECTION RESISTANCE(RSCP) = 0

-5 5 15 25 35 45

LIN

E R

EG

UL

AT

ION

(V

O)


INPUT VOLTAGE (VI) = 12V, OUTPUT VOLTAGE (VO) = 5VLOAD CURRENT (IL) = 40mAAMBIENT TEMPERATURE (TA) = +25oCSHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 015

10

5

0

5

10

OU

TP

UT

VO

LT

AG

E D

EV

IAT

ION

(m

A)

-5 5 15 25 35 45TIME (µs)

LOAD CURRENT (IL)

OUTPUT VOLTAGE (VO)

LO

AD

DE

VIA

TIO

N (m

A)

0

10

-10

-20

-30

200

160

120

80

40

0

0.8

0.7

0.6

0.5

0.4

0.3

CU

RR

EN

T L

IMIT

ING

SE

NS

E V

OL

TA

GE

(V

)

SH

OR

T C

IRC

UIT

LIM

ITIN

G C

UR

RE

NT

(mA

)

-50 0 50 100 150JUNCTION TEMPERATURE (oC)

CURRENT LIMITINGSENSE VOLTAGE

SHORT CIRCUIT LIMITINGCURRENT WITH RSCP = 5Ω

WITH RSCP = 10Ω

7-8

CA723, CA723C

FIGURE 18. LOAD TRANSIENT RESPONSE FIGURE 19. OUTPUT IMPEDANCE vs FREQUENCY

Typical Application Circuits

FIGURE 20. LOW VOLTAGE REGULATOR CIRCUIT(VO = 2V TO 7V)

FIGURE 21. HIGH VOLTAGE REGULATOR CIRCUIT(VO = 7V TO 37V)

Typical Performance Curves (CA723 and CA723C) (Continued)

OUTPUT VOLTAGE (VO)

INPUT VOLTAGE (VI)

INP

UT

VO

LT

AG

E D

EV

IAT

ION

(V

)

-5 5 15 25 35 45

6

4

2

0

-2

-4

TIME (µs)

4

2

0

-2

-4

-6

OU

TP

UT

VO

LT

AG

E D

EV

IAT

ION

(m

A)

INPUT VOLTAGE (VI) = 12VOUTPUT VOLTAGE (VO) = 5V

AMBIENT TEMPERATURE (TA) = +25oCSHORT CIRCUIT PROTECTION RESISTANCE

LOAD CURRENT (IL) = 1mA

(RSCP) = 0

OU

TP

UT

IMP

ED

AN

CE

(W)

FREQUENCY (Hz)

1µF

0.01

0.1

1

10INPUT VOLTAGE (VI) = 12VOUTPUT VOLTAGE (VO) = 5VLOAD CURRENT (IL) = 50mAAMBIENT TEMPERATURE (TA) = +25oCSHORT CIRCUIT PROTECTION

RESISTANCE (RSCP) = 0

100

864

64

8

864

2

2

2

1k 10k 100k 1M4 6 8 2 4 6 8 2 4 6 8 2 4 6 82

LOAD CAPACITANCE (CL) = 0

VIV+ VC

VO

RSCP

VREF

R1

NONINVINPUT

CREF V-COMP

C1100pF

R3

CURRENTLIMIT

REGULATEDOUTPUT

CURRENTSENSE

INV.INPUT

R2

Circuit Performance Data:Regulated Output Voltage 5VLine Regulation (∆VI= 3V) 0.5mVLoad Regulation (∆IL = 50mA) 1.5mV

Note: R3 = R1 R2R1 + R2

For Minimum Temperature Drift

VIV+ VC

VO

RSCP

VREF

R3

NONINV

INPUT V-COMP

R1

CURRENTLIMIT

REGULATEDOUTPUT 15V

CURRENTSENSE

INV.INPUT

R2

C1100pF

Circuit Performance Data:Line Regulation (∆VI = 3V) 1.5mVLoad Regulation (∆IL = 50mA) 4.5mV

Note: R3 = R1 R2R1 + R2

For Minimum Temperature Drift

R3 May Be Eliminated For Minimum Component Count

7-9

CA723, CA723C

FIGURE 22. NEGATIVE VOLTAGE REGULATOR CIRCUIT FIGURE 23. POSITIVE VOLTAGE REGULATOR CIRCUIT (WITHEXTERNAL n-p-n PASS TRANSISTOR)

FIGURE 24. POSITIVE VOLTRAGE REGULATOR CIRCUIT(WITH EXTERNAL p-n-p PAS TRANSISTOR)

FIGURE 25. FOLDBACK CURRENT LIMITING CIRCUIT

Typical Application Circuits (Continued)

V+ VC

VO

VREF

V- COMP

C1100pF

CURRENTLIMIT

REGULATEDOUTPUT-15V

CURRENTSENSE

INV.INPUTINV.

INPUT

NONR1R33kΩ

VZ

R52kΩ

R43kΩ

R2

Circuit Performance Data:Line Regulation (∆VI = 3V) 1mVLoad Regulation (∆IL = 100mA) 2mVNote: For Applications Employing the TO-5 Style Packageand Where VZ Is Required, An External; 6.2V Zener DiodeShould be Connected in Series with VO (Terminal 6).

VIVI

V+VC

VO

RSCP

VREF

NONINV

INPUT V- COMP

R1

CURRENTLIMIT

REGULATEDOUTPUT 15V

CURRENTSENSE

INV.INPUT R2

C1100pF

Circuit Performance Data:Line Regulation (∆VI = 3V) 1.5mVLoad Regulation (∆IL = 1A) 15mV

VI

VO

RSCP

VREF

NONINV

INPUT V- COMP

R1 CURRENTLIMIT

REGULATEDOUTPUT 5V

CURRENTSENSE

INV.INPUTR2

C10.001µF

Circuit Performance Data:Line Regulation (∆VI = 3V) 0.5mVLoad Regulation (∆IL = 1A) 5mV

V+

R360Ω

VC

2N5956OR2N6108

VI

V+ VC VO

RSCP

VREF

NONINV

INPUTV- COMP

CURRENTLIMIT

REGULATEDOUTPUT 5V

CURRENTSENSE

INV.INPUT

C10.001µF

Circuit Performance Data:Line Regulation (∆V = 3V) 0.5mVLoad Regulation (∆IL = 10mA) 1mV

R1

R2

30ΩR45.6kΩ

R32.7kΩ

Short Circuit Current 20mA

7-10

CA723, CA723C

FIGURE 26. POSITIVE FLOATING REGULATOR CIRCUIT FIGURE 27. NEGATIVE FLOATING REGULATOR CIRCUIT

FIGURE 28. REMOTE SHUTDOWN REGULATOR CIRCUIT WITHCURRENT LIMITING

FIGURE 29. SHUNT REGULATOR CIRCUIT

Typical Application Circuits (Continued)

V+ VC

VZ

VREF

V-COMP C1

0.001µF

CURRENTLIMIT

REGULATEDOUTPUT-50V

CURRENTSENSE

INV.INPUT

INV.INPUT

NON

R33kΩ

VO

R53.9kΩ

R43kΩ

Circuit Performance Data:Line Regulation (∆V = 20V) 15mVLoad Regulation (∆IL = 50mA) 20mV

R1

R2

VI = 85V

TI2N3442

RSCP1Ω

D112VSK3062

NOTE: For applications employing the TO-5 Style Package andwhere VZ is required, an external 6.2V zener diode shouldbe connected in series with VO (terminal 6)

V+ VC

VZ

VREF

V-COMP

C10.001µF

CURRENTLIMIT

REGULATEDOUTPUT-100V

CURRENTSENSE

INV.INPUTINV.

INPUT

NON

R33kΩ

VOR6

10kΩ

R43kΩ

Circuit Performance Data:Line Regulation (∆VI = 20V) 30mVLoad Regulation (∆IL =100mA) 20mV

R2

R1

VI

TI2N6211

D112V

SK3062

R510kΩ

NOTE: For applications employing the TO-5 Style Package andwhere VZ is required, an external 6.2V zener diode shouldbe connected in series with VO (terminal 6)

VI

V+ VC VO RSCPVREF

NONINV

INPUT V-COMP

CURRENTLIMIT

REGULATEDOUTPUT 5V

CURRENTSENSE

INV.INPUT

C10.001µF


R1

R2

R42kΩ

R3

2.kΩ

Short Circuit Current 20mANOTE: 1. A current limiting transistor may be used for shutdown if

2. Add a diode if VO > 10V.current limiting is not required.

NOTE 2

CCSLLOGICINPUT

TI2N3053

V+ VC VOVREF

INVINPUT V- COMP

CURRENT LIMIT

REGULATEDOUTPUT 5V

CURRENT SENSE

NON INV.INPUT

C10.005µF


R1

R2

R4100ΩR3

100Ω

NOTE: For applications employing the TO-5 Style Package andwhere VZ is required, an external 6.2V zener diodeshould be connected in series with VO (terminal 6).

C

VZ

VI

Voltage Regulator CA723

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Transcript of Voltage Regulator CA723