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CA723, CA723C
Data Sheet April 1999 File Number
788.4
Voltage Regulators Adjustable from 2V to 37V at Output Currents Up to 150mA without External Pass Transistors
The CA723 and CA723C are silicon monolithic integrated circuits designed for service as voltage regulators at output voltages 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 accessible inputs for adjustable current limiting and remote shutdown and, in addition, feature low standby current drain, low temperature drift, and high ripple rejection. The CA723 and CA723C may be used with positive and negative 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 NPN or PNP external pass transistors.
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 NUMBER CA0723E CA0723T CA0723CE TEMP. RANGE (oC) -55 to 125 -55 to 125 0 to 70 PACKAGE 14 Ld PDIP 10 Pin Can 14 Ld PDIP PKG. NO. E14.3
Pinouts
CA723 (PDIP) TOP VIEW
NC 1 14 NC 13 FREQ COMP 12 V+ UNREG INPUT
ERROR AMP
T10.C E14.3
CURRENT 2 LIMIT CURRENT 3 SENSE INV 4 INPUT NON-INV 5 INPUT VREF 6 V- 7 -
11 VC 10 VO 9 VZ 8 NC
+
VOLT REF
CA723C (CAN) TOP VIEW
CURRENT LIMIT TAB 10 CURRENT FREQ 9 COMP SENSE 1 INV INPUT 2 NON-INV 3 INPUT +
ERROR AMP
V+ 8 UNREG INPUT 7 VC 6 5
-
VOLT REF
VREF 4
VO
V-, (CASE INTERNALLY CONNECTED TO TERM 5)
3-3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright (c) Intersil Corporation 1999
CA723, CA723C Functional Block Diagram
V+ TEMPERATURECOMPENSATED ZENER VREF FREQUENCY UNREGULATED COMPENSATION INPUT
INVERTING INPUT ERROR AMP +
VC SERIES PASS TRANSISTOR VO REGULATED OUTPUT VZ CURRENT LIMIT CURRENT SENSE CURRENT LIMITER
VOLT REF AMP
NON-INVERTING INPUT
V-
V+ UNREGULATED INPUT R1 500 R3 25k Q3 D3 D1 6.2V R2 15k Q4 Q7 Q9 R4 1k R5 1k Q8 Q14
VC
Q15 R12 15k Q11 Q12 D4 VO
Q5 R6 100 Q1 Q6 R7 30k C1 5pF D2 6.2V Q10 R9 300 R8 5k VREF R10 20k
Q13
VZ FREQUENCY COMPENSATION CURRENT LIMIT CURRENT SENSE
R11 150
Q16
NON-INVERTING VINPUT
INVERTING INPUT
FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C
3-4
CA723, CA723C
Absolute Maximum Ratings
DC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40V (Between V+ and V- Terminals) Pulse Voltage for 50ms Pulse Width (Between V+ and V- Terminals) . . . . . . . . . . . . . .50V Differential Input-Output Voltage . . . . . . . . . . . . . . . . . . . . . . . . .40V Differential Input Voltage Between Inverting and Noninverting Inputs . . . . . . . . . . . . . . 5V Between Noninverting Input and V- . . . . . . . . . . . . . . . . . . . . . .8V Current From Zener Diode Terminal (VZ) . . . . . . . . . . . . . . . . 25mA
Thermal Information
Thermal Resistance (Typical, Note 1) JA (oC/W) JC (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . 120 N/A Metal Can. . . . . . . . . . . . . . . . . . . . . . . 136 65 Device Dissipation CA723T, Up to TA = 25oC . . . . . . . . . . . . . . . . . . . . . . . . .900mW CA723E, CA723CE, Up to TA = 25oC . . . . . . . . . . . . . . .1000mW CA723T, Above TA = 25oC . . . . . . . . . . . . . . . . . . . . . . 7.4mW/oC CA723E, CA723CE, Above TA = 25oC . . . . . . . . . . . . 8.3mW/oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature, During Soldering . . . . . . . . . . 265oC At a distance 1/16" 1/32" (1.59mm 0.79mm) from case for 10s Max
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE: 1. JA is measured with the component mounted on an evaluation PC board in free air.
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 = 10k. (Figure 20) CA723 CA723C MAX MIN TYP MAX UNITS
PARAMETER DC CHARACTERISTICS Quiescent Regulator Current, IQ Input Voltage Range, VI Output Voltage Range, VO Differential Input-Output Voltage, VI - VO Reference Voltage, VREF Line Regulation (Note 2)
TEST CONDITION
MIN
TYP
IL = 0, VI = 30V
9.5 2 3 6.95
2.3 7.15 0.02 0.01 0.03 0.002 74 86 65
3.5 40 37 38 7.35 0.2 0.1 0.3 0.15 0.6 0.015 -
9.5 2 3 6.8 -
2.3 7.15 0.1 0.01 0.03 0.003 74 86 65
4 40 37 38 7.5 0.5 0.1 0.3 0.2 0.6 0.015 -
mA V V V V % VO % VO % VO % VO % VO % VO % VO %/oC %/oC dB dB mA
VI = 12V to 40V VI = 12V to 15V VI = 12V to 15V, TA = -55oC to 125oC VI = 12V to 15V, TA = 0oC to 70oC
-
Load Regulation (Note 2)
IL = 1mA to 50mA IL = 1mA to 50mA, TA = -55oC to 125oC IL = 1mA to 50mA, TA = 0oC to 70oC
Output-Voltage Temperature Coefficient, VO Ripple Rejection (Note 3)
TA = -55oC to 125oC TA = 0oC to 70oC f = 50Hz to 10kHz f = 50Hz to 10kHz, CREF = 5F
Short Circuit Limiting Current, ILIM
RSCP = 10, VO = 0
3-5
CA723, CA723C
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 = 10k. (Figure 20) (Continued) CA723 PARAMETER TEST CONDITION MIN TYP -20 2.5 MAX MIN CA723C TYP 20 2.5 MAX UNITS V V
Equivalent Noise RMS Output Voltage, VN BW = 100Hz to 10kHz, (Note 3) CREF = 0 BW = 100Hz to 10kHz, CREF = 5F NOTES:
2. Line and load regulation specifications are given for condition of a constant chip temperature. For high dissipation condition, temperature drifts must be separately taken into account. 3. For CREF (See Figure 20)
Typical Performance Curves (CA723)
MAX JUNCTION TEMP (TJ) = 150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW (NO HEAT SINK) OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
MAXIMUM LOAD CURRENT (mA)
150
0.05 LOAD REGULATION (VO)
0 AMBIENT TEMPERATURE (TA) = 25oC -0.05 -55oC -0.1 125oC -0.15
100
AMBIENT TEMPERATURE (TA) = 25oC
50
125oC 0 0 10 20 30 40 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V) -0.2 0 20 40 60 80 OUTPUT CURRENT (mA) 100
FIGURE 2. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
0.05
FIGURE 3. LOAD REGULATION WITHOUT CURRENT LIMITING
0 LOAD REGULATION (VO)
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10 LOAD REGULATION (VO)
0.1
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
-0.05
0 AMBIENT TEMPERATURE (TA) = -55oC -0.1
-0.1
-55oC AMBIENT TEMP (TA) = 25oC
-0.15
125oC
0.2 25oC -0.3 125oC
-0.2
-0.25 0 5 10 15 20 OUTPUT CURRENT (mA) 25 30
-0.4 0 20 40 60 80 100 OUTPUT CURRENT (mA)
FIGURE 4. LOAD REGULATION WITH CURRENT LIMITING
FIGURE 5. LOAD REGULATION WITH CURRENT LIMITING
3-6
CA723, CA723C Typical Performance Curves (CA723)
1.2 1.0 OUTPUT VOLTAGE (V) 0.8 0.6 0.4 0.2 0 0 20 40 AMBIENT TEMPERATURE (TA) = -55oC OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10 OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CIRCUIT (IL) = 0 5 4 3 2 1 0 100 0 10 20 INPUT VOLTAGE (V) 30 40 125oC AMBIENT TEMPERATURE (TA) = -55oC 25oC
(Continued)
125oC
60
25oC
80
OUTPUT CURRENT (mA)
FIGURE 6.
CURRENT LIMITING CHARACTERISTICS
QUIESCENT CURRENT (mA)
FIGURE 7. QUIESCENT CURRENT vs INPUT VOLTAGE
MAXIMUM LOAD CURRENT (mA)
150
MAXIMUM LOAD CURRENT (mA)
MAX. JUNCTION TEMP. (TJ) = 150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW TO-5 STYLE PACKAGE WITH NO HEAT SINK
150
MAX. JUNCTION TEMP. (TJ) = 125oC THERMAL RESISTANCE = 125oC/W QUIESCENT DISSIPATION (PQ) = 60mW DUAL - IN - LINE PLASTIC PACKAGE WITH NO HEAT SINK
100
100 AMBIENT TEMPERATURE (TA) = 25oC
AMBIENT TEMPERATURE (TA) = 25oC 50
50
70oC 0 0 10 20 30 40 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V) 0 0
70oC 20 40 10 30 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 8. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
FIGURE 9. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE FOR CA723CE
LOAD REGULATION (VO)
0
AMBIENT TEMPERATURE (TA) = 25oC 0oC
LOAD REGULATION (VO)
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10 0 AMBIENT TEMPERATURE (TA) = 25oC
0oC
-0.1
70oC
-0.1 70oC
-0.2 0 20 40 60 80 100 OUTPUT CURRENT (mA)
-0.2 0 10 20 OUTPUT CURRENT (mA) 30
FIGURE 10. LOAD REGULATION WITHOUT CURRENT LIMITING
FIGURE 11. LOAD REGULATION WITH CURRENT LIMITING
3-7
CA723, CA723C Typical Performance Curves (CA723)
1.2 AMBIENT TEMPERATURE (TA) = 25oC
(Continued)
OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CURRENT (IL) = 0 5 4 3 2 1
0.8
QUIESCENT CURRENT (mA)
1.0 OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10
0.6
AMBIENT TEMPERATURE (TA) = 25oC 0oC 70oC
0.4
0.2 70oC 0 0 10 20 40 60 OUTPUT CURRENT (mA) 80 100 0oC
0 0 10 20 30 INPUT VOLTAGE (V) 40
FIGURE 12.
CURRENT LIMITING CHARACTERISTICS
FIGURE 13. QUIESCENT CURRENT vs INPUT VOLTAGE
Typical Performance Curves (CA723 and CA723C)
INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = I TO 50mA AMBIENT TEMPERATURE (TA) = 25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = 25oC DIFFERENTIAL INPUT VOLTAGE (VT) = 3V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0.2 LOAD REGULATION (VO) 0.1
0.3 LINE REGULATION (VO)
0.2
0
0.1
-0.1 -0.2 -0.3 -5 5 15 25 35 45 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
0
-0.1 -0.2 -5 5 15 25 35 45 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 14. LOAD REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
FIGURE 15. LINE REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
SHORT CIRCUIT LIMITING CURRENT (mA)
OUTPUT VOLTAGE DEVIATION (mA)
15
INPUT VOLTAGE (V I) = 12V, OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 40mA AMBIENT TEMPERATURE (TA) = 25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
CURRENT LIMITING SENSE VOLTAGE (V)
0.8
200 CURRENT LIMITING SENSE VOLTAGE 160
10
LOAD CURRENT (IL)
10
LOAD DEVIATION (mA)
0.7
0 5 OUTPUT VOLTAGE (VO) -10 0 -20 5 -30 10 -5 5 15 25 TIME (s) 35 45
0.6 SHORT CIRCUIT LIMITING CURRENT WITH RSCP = 5
120
0.5
80
0.4
WITH RSCP = 10
40
0.3 -50 0 50 100 150 JUNCTION TEMPERATURE (oC)
0
FIGURE 16. LINE TRANSIENT RESPONSE
FIGURE 17. CURRENT LIMITING CHARACTERISTIC vs JUNCTION TEMPERATURE
3-8
CA723, CA723C Typical Performance Curves (CA723 and CA723C)
(Continued)
10 OUTPUT VOLTAGE DEVIATION (mA) 6 INPUT VOLTAGE DEVIATION (V) 4 INPUT VOLTAGE (VI) 2
4
OUTPUT IMPEDANCE (W)
2 OUTPUT VOLTAGE (VO) 0
0
8 INPUT VOLTAGE (VI) = 12V 6 OUTPUT VOLTAGE (V ) = 5V O 4 LOAD CURRENT (I ) = 50mA L o 2 AMBIENT TEMPERATURE (TA) = 25 C SHORT CIRCUIT PROTECTION 1 RESISTANCE (RSCP) = 0 8 6 4 LOAD CAPACITANCE (CL) = 0 2 8 6 4 2
1F
-2 INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = 25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 -5 5 15 25 TIME (s) 35 45
0.1
-2 -4
-4
-6
0.01 100
2
4 68 1k
2
4 68 2 4 68 2 10k 100k FREQUENCY (Hz)
468 1M
FIGURE 18.
LOAD TRANSIENT RESPONSE
FIGURE 19. OUTPUT IMPEDANCE vs FREQUENCY
Typical Application Circuits
V+ VREF VC VO RSCP R1 NON INV INPUT CREF R2 VCOMP CURRENT LIMIT CURRENT R3 SENSE INV. INPUT C1 100pF NON INV INPUT REGULATED OUTPUT R3 CURRENT LIMIT CURRENT SENSE C1 100pF VCOMP INV. INPUT V+ VC VO RSCP REGULATED OUTPUT 15V R1
VI
VI VREF
R2
Circuit Performance Data: Regulated Output Voltage 5V Line Regulation (VI= 3V) 0.5mV Load Regulation (IL = 50mA) 1.5mV Note: R3 = R1 R2 For Minimum Temperature Drift R1 + R2
Circuit Performance Data: Line Regulation (VI = 3V) 1.5mV Load Regulation (IL = 50mA) 4.5mV Note: R3 = R1 R2 For Minimum Temperature Drift R1 + R2 R3 May Be Eliminated For Minimum Component Count
FIGURE 20. LOW VOLTAGE REGULATOR CIRCUIT (VO = 2V TO 7V)
FIGURE 21. HIGH VOLTAGE REGULATOR CIRCUIT (VO = 7V TO 37V)
3-9
CA723, CA723C Typical Application Circuits
V+ R2 R4 3k VREF VC VZ R5 2k VREF VO CURRENT LIMIT CURRENT SENSE R3 3k R1 NON INV. INPUT INV. INPUT COMP REGULATED OUTPUT-15V NON INV INPUT CURRENT R SCP LIMIT CURRENT SENSE INV. INPUT COMP C1 100pF REGULATED OUTPUT 15V R1 R2
(Continued)
VI V+ VI VC VO
VC1 100pF
V-
Circuit Performance Data: Line Regulation (VI = 3V) 1mV Load Regulation (IL = 100mA) 2mV Note: For Applications Employing the TO-5 Style Package and Where VZ Is Required, An External; 6.2V Zener Diode Should be Connected in Series with VO (Terminal 6). FIGURE 22. NEGATIVE VOLTAGE REGULATOR CIRCUIT
Circuit Performance Data: Line Regulation (VI = 3V) 1.5mV Load Regulation (IL = 1A) 15mV
FIGURE 23. POSITIVE VOLTAGE REGULATOR CIRCUIT (WITH EXTERNAL NPN PASS TRANSISTOR)
VI R3 60 VC VO 2N5956 OR 2N6108
VI V+ VC REGULATED OUTPUT 5V R3 2.7k RSCP 30 R4 5.6k
V+ VREF
VREF
VO
R1
CURRENT LIMIT CURRENT SENSE RSCP
R1
CURRENT LIMIT CURRENT SENSE
R2
NON INV INPUT
V-
INV. INPUT COMP C1 0.001F
REGULATED OUTPUT 5V
R2
NON INV INPUT
V-
INV. COMP INPUT C1 0.001F
Circuit Performance Data: Line Regulation (VI = 3V) 0.5mV Load Regulation (IL = 1A) 5mV
Circuit Performance Data: Line Regulation (V = 3V) 0.5mV Load Regulation (IL = 10mA) 1mV Short Circuit Current 20mA FIGURE 25. FOLDBACK CURRENT LIMITING CIRCUIT
FIGURE 24.
POSITIVE VOLTRAGE REGULATOR CIRCUIT (WITH EXTERNAL PNP PASS TRANSISTOR)
3-10
CA723, CA723C Typical Application Circuits
R5 3.9k V+ VREF VC VO VZ R4 3k D1 12V SK3062 R3 3k NON INV. INPUT R2 R1 CURRENT LIMIT CURRENT SENSE INV. INPUT VCOMP R1 C1 0.001F REGULATED OUTPUT-50V TI 2N3442 RSCP 1 R2 D1 12V SK3062 VI = 85V VREF
(Continued)
R5 10k
V+
VC VO VZ R6 10k
VI
TI 2N6211
R3 3k
CURRENT LIMIT CURRENT SENSE INV. INPUT C1 0.001F COMP REGULATED OUTPUT-100V
NON INV. INPUT R4 3k
V-
Circuit Performance Data: Line Regulation (V = 20V) 15mV Load Regulation (IL = 50mA) 20mV NOTE: For applications employing the TO-5 Style Package and where VZ is required, an external 6.2V zener diode should be connected in series with VO (terminal 6) FIGURE 26. POSITIVE FLOATING REGULATOR CIRCUIT
Circuit Performance Data: Line Regulation (VI = 20V) 30mV Load Regulation (IL =100mA) 20mV NOTE: For applications employing the TO-5 Style Package and where VZ is required, an external 6.2V zener diode should be connected in series with VO (terminal 6) FIGURE 27. NEGATIVE FLOATING REGULATOR CIRCUIT
VI VREF V+ VC VO RSCP NOTE 2 REGULATED OUTPUT 5V R1 CURRENT LIMIT CURRENT SENSE R2 NON INV INPUT INV. INPUT R3 COMP VC1 0.001F 2k TI 2N3053 R4 2.k CCSL LOGIC INPUT R2 INV INPUT VR1 C CURRENT LIMIT CURRENT SENSE NON INV. COMP INPUT C1 0.005F VREF V+ VC VO R3 VZ 100
VI R4 100 REGULATED OUTPUT 5V
Circuit Performance Data: Line Regulation (VI = 3V) 0.5mV Load Regulation (IL = 50mA) 1.5mV Short Circuit Current 20mA NOTE: 1. A current limiting transistor may be used for shutdown if current limiting is not required. 2. Add a diode if VO > 10V. FIGURE 28. REMOTE SHUTDOWN REGULATOR CIRCUIT WITH CURRENT LIMITING
Circuit Performance Data: Load Regulation (IL = 100mA) 1.5mV NOTE: For applications employing the TO-5 Style Package and where VZ is required, an external 6.2V zener diode should be connected in series with VO (terminal 6).
FIGURE 29. SHUNT REGULATOR CIRCUIT Line Regulation (VI = 10V) 0.5mV
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