Voltage Regulator Ca723
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S E M I C O N D U C T O R
CA723, CA723C
Voltage Regulators Adjustable from 2V to 37V at Output Currents Up to 150mA Without External Pass Transistors
April 1994
Features
Description
• 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
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.
Applications • • • • •
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 n-p-n or p-n-p external pass transistors.
Series and Shunt Voltage Regulator Floating Regulator Switching Voltage Regulator High-Current Voltage Regulator Temperature Controller
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.
Ordering Information PART
TEMPERATURE
CA723E
-55oC
+125oC
CA723T
-55oC to +125oC
to
CA723CE
0oC
CA723CT
0oC to +70oC
to
+70oC
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.
PACKAGE 14Lead Plastic DIP 10 Pin Metal Can 14 Lead Plastic DIP 10 Pin Metal Can
Pinouts
Functional Block Diagram CA723 (PDIP) TOP VIEW 14 NC
NC 1 CURRENT 2 LIMIT
13 FREQ COMP
CURRENT 3 SENSE
12 V+ UNREG INPUT
INV 4 INPUT
-
VREF
TEMPERATURECOMPENSATED ZENER
+
10 VO VOLT REF
6
VOLT REF AMP
FREQUENCY UNREGULATED COMPENSATION INPUT
INVERTING INPUT
11 VC
ERROR AMP
NON-INV 5 INPUT
V+
VC
-
VREF
SERIES PASS TRANSISTOR
ERROR AMP +
NON-INVERTING INPUT
9 VZ
VO REGULATED OUTPUT VZ
8 NC
V- 7
V-
CA723C (CAN) TOP VIEW
CURRENT LIMIT
CURRENT SENSE
CURRENT LIMITER
CURRENT LIMIT TAB 10 CURRENT FREQ 9 COMP SENSE 1 INV INPUT NON-INV INPUT
2
V+ 8 UNREG INPUT
+ ERROR AMP
-
3
7 VC
VOLT REF
VREF
6
4 5
VO
V-, (CASE INTERNALLY CONNECTED TO TERM 5)
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures. Copyright
© Harris Corporation 1994
7-3
File Number
788.3
Specifications CA723, CA723C Absolute Maximum Ratings
Operating Conditions
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 Resistance θJA θJC Plastic DIP Package . . . . . . . . . . . . . . . . 120oC/W Metal Can . . . . . . . . . . . . . . . . . . . . . . . . 136oC/W 65oC/W Device Dissipation CA723T, CA723CT, Up to TA = +25oC. . . . . . . . . . . . . . . . 900mW CA723E, CA723CE, Up to TA = +25oC . . . . . . . . . . . . . . 1000mW CA723T, CA723CT, Above TA = +25oC . . . . . . . . . . . . . 7.4mW/oC CA723E, CA723CE, Above TA = +25oC . . . . . . . . . . . . 8.3mW/oC Ambient Temperature Range Operating Temperature Range . . . . . . . . . . . . . . -55oC to +125oC Storage Temperature Range . . . . . . . . . . . . . . . . -65oC to +150oC Lead Temperature, During Soldering . . . . . . . . . . . . . . . . . . +265oC At a distance 1/16” ± 1/32” (1.59mm ± 0.79mm) from case for 10s max
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.
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) CA723
PARAMETERS
TEST CONDITION
CA723C
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
-
2.3
3.5
-
2.3
4
mA
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
6.95
7.15
7.35
6.8
7.15
7.5
V
-
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
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
TA = -55oC to +125oC
-
0.002
0.015
-
-
-
%/oC
TA = 0oC to +70oC
-
-
-
-
0.003
0.015
%/oC
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
DC CHARACTERISTICS Quiescent Regulator Current, IQ
IL = 0, VI = 30V
Input Voltage Range, VI
Reference Voltage, VREF Line Regulation (Note 1)
Load Regulation (Note 1)
Output-Voltage Temperature Coefficient, ∆VO Ripple Rejection (Note 2)
VI = 12V to 40V
NOTES: 1. 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. 2. For CREF (See Figure 20)
7-4
CA723, CA723C V+
VC
UNREGULATED INPUT
R1 500Ω
R5 1kΩ
R4 1kΩ
R3 25kΩ
Q8
Q3 Q7
D3 D1 6.2V
R2 15kΩ
Q14
Q4
Q15
Q9
R12 15kΩ
R6 100Ω C1 5pF
Q1
D4 Q10
R7 30kΩ
R9 300Ω R8 5kΩ VREF
VZ
Q13
D2 6.2V
Q6
VO
Q11 Q12
Q5
R10 20kΩ
R11 150Ω
FREQUENCY COMPENSATION CURRENT LIMIT
Q16
CURRENT SENSE NON-INVERTING VINPUT
INVERTING INPUT
FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C
MAX JUNCTION TEMP (TJ) = +150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW (NO HEAT SINK)
150
AMBIENT TEMPERATURE (TA) = +25oC
100
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0.05 LOAD REGULATION (VO)
MAXIMUM LOAD CURRENT (mA)
Typical Performance Curves (CA723)
50
0 AMBIENT TEMPERATURE (TA) = +25oC -0.05 -55oC -0.1 +125oC -0.15
+125oC -0.2
0 0 10 20 30 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
40
0
FIGURE 2. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE 0.05
LOAD REGULATION (VO)
LOAD REGULATION (VO)
-55oC AMBIENT TEMP (TA) =
-0.15
100
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0.1
-0.05
-0.1
40 60 80 OUTPUT CURRENT (mA)
FIGURE 3. LOAD REGULATION WITHOUT CURRENT LIMITING
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω
0
20
+25oC
+125oC
0 AMBIENT TEMPERATURE (TA) = -55oC -0.1
0.2 +25oC -0.3
-0.2
+125oC -0.4
-0.25 0
5
10
15
20
25
0
30
OUTPUT CURRENT (mA)
FIGURE 4. LOAD REGULATION WITH CURRENT LIMITING
20
40 60 80 100 OUTPUT CURRENT (mA)
FIGURE 5. LOAD REGULATION WITH CURRENT LIMITING
7-5
CA723, CA723C Typical Performance Curves (CA723)
(Continued)
0.8
0.6
+125oC
0 0
20
40
60
+25oC
0.4
QUIESCENT CURRENT (mA)
AMBIENT TEMPERATURE (TA) = -55oC
OUTPUT VOLTAGE (V)
1.0
0.2
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω
1.2 OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CIRCUIT (IL) = 0 5 4 AMBIENT TEMPERATURE (TA) = -55oC
3
+25oC 2 +125oC
1 0
80
0
100
10
20
MAX. JUNCTION TEMP. (TJ) = +150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW TO-5 STYLE PACKAGE WITH NO HEAT SINK
MAX. JUNCTION TEMP. (TJ) = +125oC THERMAL RESISTANCE = 125oC/W QUIESCENT DISSIPATION (PQ) = 60mW DUAL - IN - LINE PLASTIC PACKAGE WITH NO HEAT SINK
150
100
AMBIENT TEMPERATURE (TA) = +25oC 50
100 AMBIENT TEMPERATURE (TA) = +25oC
50
+70oC
+70oC 0
0 0
0
10 20 30 40 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
40
30
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω LOAD REGULATION (VO)
AMBIENT TEMPERATURE (TA) = +25oC 0oC
+70oC
-0.1
20
FIGURE 9. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE FOR CA723CE
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 0
10
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 8. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
LOAD REGULATION (VO)
40
FIGURE 7. QUIESCENT CURRENT vs INPUT VOLTAGE
MAXIMUM LOAD CURRENT (mA)
MAXIMUM LOAD CURRENT (mA)
FIGURE 6. CURRENT LIMITING CHARACTERISTICS
150
30
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
AMBIENT TEMPERATURE (TA) = +25oC
0
0oC
-0.1 +70oC
-0.2
-0.2 0
20
40 60 80 100 OUTPUT CURRENT (mA)
0
FIGURE 10. LOAD REGULATION WITHOUT CURRENT LIMITING
10 20 OUTPUT CURRENT (mA)
30
FIGURE 11. LOAD REGULATION WITH CURRENT LIMITING
7-6
CA723, CA723C
AMBIENT TEMPERATURE (TA) = +25oC
OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CURRENT (IL) = 0 QUIESCENT CURRENT (mA)
1.2
(Continued)
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10
Typical Performance Curves (CA723)
0.2
5 4
AMBIENT TEMPERATURE (TA) = +25oC
3
0oC
2
+70oC
1 +70oC
0oC
0 0
10
20 40 60 OUTPUT CURRENT (mA)
80
0
100
0
FIGURE 12. CURRENT LIMITING CHARACTERISTICS
10
20 30 INPUT VOLTAGE (V)
40
FIGURE 13. QUIESCENT CURRENT vs INPUT VOLTAGE
Typical Performance Curves (CA723 and CA723C)
0.1
0
-0.1 -0.2
-5
5
15
25
35
0
-0.2 -5 5 15 25 35 45 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
45
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 14. LOAD REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
FIGURE 15. LINE REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
LOAD CURRENT (IL)
10
10
0 5
OUTPUT VOLTAGE (VO) -10
0
CURRENT LIMITING SENSE VOLTAGE (V)
INPUT VOLTAGE (V I) = 12V, OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 40mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
LOAD DEVIATION (mA)
OUTPUT VOLTAGE DEVIATION (mA)
0.1
-0.1
-0.3
15
OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = +25oC 0.3 DIFFERENTIAL INPUT VOLTAGE (∆VT) = 3V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 0.2
-20 5 -30
200
0.8 CURRENT LIMITING SENSE VOLTAGE
160
0.7
120
0.6 SHORT CIRCUIT LIMITING CURRENT WITH RSCP = 5Ω
80
0.5
0.4
WITH RSCP = 10Ω
0.3
10 -5
5
15
25 TIME (µs)
35
40
SHORT CIRCUIT LIMITING CURRENT (mA)
LOAD REGULATION (VO)
0.2
LINE REGULATION (VO)
INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = I TO 50mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0 -50 0 50 100 150 JUNCTION TEMPERATURE (oC)
45
FIGURE 16. LINE TRANSIENT RESPONSE
FIGURE 17. CURRENT LIMITING CHARACTERISTIC vs JUNCTION TEMPERATURE
7-7
CA723, CA723C Typical Performance Curves (CA723 and CA723C)
(Continued)
INPUT VOLTAGE (VI) 2
4
0
2 OUTPUT VOLTAGE (VO)
-2
0 INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
-2 -4 -5
5
15
25 TIME (µs)
35
-4
OUTPUT IMPEDANCE (W)
4
6
INPUT VOLTAGE DEVIATION (V)
OUTPUT VOLTAGE DEVIATION (mA)
10
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 RESISTANCE (RSCP) = 0 1 8 6 4 LOAD CAPACITANCE (CL) = 0 2
0.1
1µF
8 6 4 2
0.01
2
-6
4 68 1k
100
45
2
4 68 2 10k
4 68 2 100k
4 6 8 1M
FREQUENCY (Hz)
FIGURE 18. LOAD TRANSIENT RESPONSE
FIGURE 19. OUTPUT IMPEDANCE vs FREQUENCY
Typical Application Circuits V+
VI
VC
VI
VREF
V+
VC
VREF
VO
VO
RSCP CURRENT LIMIT
R1 NON INV INPUT CREF
R2
RSCP REGULATED OUTPUT
R3
CURRENT R3 SENSE INV. INPUT V-
NON INV INPUT
C1 100pF
REGULATED OUTPUT 15V
CURRENT SENSE
R1
C1 100pF
INV. INPUT
V-
R2
COMP
COMP
Circuit Performance Data: Regulated Output Voltage 5V Line Regulation (∆VI= 3V) 0.5mV Load Regulation (∆IL = 50mA) 1.5mV Note: R3 =
CURRENT LIMIT
Circuit Performance Data: Line Regulation (∆VI = 3V) 1.5mV Load Regulation (∆IL = 50mA) 4.5mV R1 R2 For Minimum Temperature Drift R1 + R2 R3 May Be Eliminated For Minimum Component Count
Note: R3 =
R1 R2 For Minimum Temperature Drift R1 + R2
FIGURE 20. LOW VOLTAGE REGULATOR CIRCUIT (VO = 2V TO 7V)
FIGURE 21. HIGH VOLTAGE REGULATOR CIRCUIT (VO = 7V TO 37V)
7-8
CA723, CA723C Typical Application Circuits V+ R2
(Continued)
VC
VI
VI
VREF
R5 2kΩ
VZ
VC
V+ VREF
VO
VO
R4 3kΩ
CURRENT LIMIT CURRENT SENSE
R3 3kΩ
R1
NON INV. INPUT
V-
INV. INPUT COMP
NON INV INPUT
REGULATED OUTPUT-15V
C1 100pF
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).
V-
CURRENT R SCP LIMIT
REGULATED OUTPUT 15V
CURRENT SENSE
R1
INV. INPUT COMP C1 100pF
R2
Circuit Performance Data: Line Regulation (∆VI = 3V) 1.5mV Load Regulation (∆IL = 1A) 15mV
FIGURE 22. NEGATIVE VOLTAGE REGULATOR CIRCUIT
FIGURE 23. POSITIVE VOLTAGE REGULATOR CIRCUIT (WITH EXTERNAL n-p-n PASS TRANSISTOR)
VI
VI R3 60Ω
V+ VREF
VC
VO
2N5956 OR 2N6108
V+
VREF
VC
REGULATED OUTPUT 5V
VO R3 2.7kΩ
R1
CURRENT LIMIT CURRENT SENSE
R2
NON INV INPUT
V-
CURRENT LIMIT
R1 RSCP
INV. INPUT COMP C1 0.001µF
RSCP 30Ω R4 5.6kΩ
CURRENT SENSE
REGULATED OUTPUT 5V
R2
NON INV INPUT
V-
INV. COMP INPUT C1 0.001µF
Circuit Performance Data: Line Regulation (∆V = 3V) 0.5mV Load Regulation (∆IL = 10mA) 1mV Short Circuit Current 20mA
Circuit Performance Data: Line Regulation (∆VI = 3V) 0.5mV Load Regulation (∆IL = 1A) 5mV FIGURE 24. POSITIVE VOLTRAGE REGULATOR CIRCUIT (WITH EXTERNAL p-n-p PAS TRANSISTOR)
FIGURE 25. FOLDBACK CURRENT LIMITING CIRCUIT
7-9
CA723, CA723C Typical Application Circuits
(Continued)
R5 10kΩ
R5 3.9kΩ
V+
VC
VI = 85V V+
VC
VREF
VREF
VO VZ
R4 3kΩ
R1
D1 12V SK3062 R3 3kΩ
RSCP 1Ω
R3 3kΩ
D1 12V SK3062
NON INV. INPUT R4 3kΩ
R1
VCOMP
TI 2N6211
R2
INV. INPUT R2
R6 10kΩ
VO VZ
TI 2N3442
CURRENT LIMIT CURRENT SENSE
NON INV. INPUT
VI
C1 0.001µF
CURRENT LIMIT CURRENT SENSE INV. INPUT C1 0.001µF
V-
COMP REGULATED OUTPUT-100V
REGULATED OUTPUT-50V
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)
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 26. POSITIVE FLOATING REGULATOR CIRCUIT
FIGURE 27. NEGATIVE FLOATING REGULATOR CIRCUIT
VI VREF
VI V+
VC
VO RSCP
NOTE 2
V+
VREF
VC
VZ
REGULATED OUTPUT 5V CURRENT LIMIT
R1
NON INV INPUT
R1
R4 100Ω REGULATED OUTPUT 5V
CURRENT LIMIT CURRENT SENSE
INV. INPUT R3 COMP VC1 0.001µF
R3 100Ω
C
CURRENT SENSE R2
VO
2kΩ
TI 2N3053
R2 R4 2.kΩ
CCSL LOGIC INPUT
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.
INV INPUT
V-
NON INV. COMP INPUT C1 0.005µF
Circuit Performance Data: Line Regulation (∆VI = 10V) 0.5mV
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 28. REMOTE SHUTDOWN REGULATOR CIRCUIT WITH CURRENT LIMITING
7-10
FIGURE 29. SHUNT REGULATOR CIRCUIT
CA723, CA723C
Voltage Regulators Adjustable from 2V to 37V at Output Currents Up to 150mA Without External Pass Transistors
April 1994
Features
Description
• 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
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.
Applications • • • • •
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 n-p-n or p-n-p external pass transistors.
Series and Shunt Voltage Regulator Floating Regulator Switching Voltage Regulator High-Current Voltage Regulator Temperature Controller
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.
Ordering Information PART
TEMPERATURE
CA723E
-55oC
+125oC
CA723T
-55oC to +125oC
to
CA723CE
0oC
CA723CT
0oC to +70oC
to
+70oC
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.
PACKAGE 14Lead Plastic DIP 10 Pin Metal Can 14 Lead Plastic DIP 10 Pin Metal Can
Pinouts
Functional Block Diagram CA723 (PDIP) TOP VIEW 14 NC
NC 1 CURRENT 2 LIMIT
13 FREQ COMP
CURRENT 3 SENSE
12 V+ UNREG INPUT
INV 4 INPUT
-
VREF
TEMPERATURECOMPENSATED ZENER
+
10 VO VOLT REF
6
VOLT REF AMP
FREQUENCY UNREGULATED COMPENSATION INPUT
INVERTING INPUT
11 VC
ERROR AMP
NON-INV 5 INPUT
V+
VC
-
VREF
SERIES PASS TRANSISTOR
ERROR AMP +
NON-INVERTING INPUT
9 VZ
VO REGULATED OUTPUT VZ
8 NC
V- 7
V-
CA723C (CAN) TOP VIEW
CURRENT LIMIT
CURRENT SENSE
CURRENT LIMITER
CURRENT LIMIT TAB 10 CURRENT FREQ 9 COMP SENSE 1 INV INPUT NON-INV INPUT
2
V+ 8 UNREG INPUT
+ ERROR AMP
-
3
7 VC
VOLT REF
VREF
6
4 5
VO
V-, (CASE INTERNALLY CONNECTED TO TERM 5)
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures. Copyright
© Harris Corporation 1994
7-3
File Number
788.3
Specifications CA723, CA723C Absolute Maximum Ratings
Operating Conditions
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 Resistance θJA θJC Plastic DIP Package . . . . . . . . . . . . . . . . 120oC/W Metal Can . . . . . . . . . . . . . . . . . . . . . . . . 136oC/W 65oC/W Device Dissipation CA723T, CA723CT, Up to TA = +25oC. . . . . . . . . . . . . . . . 900mW CA723E, CA723CE, Up to TA = +25oC . . . . . . . . . . . . . . 1000mW CA723T, CA723CT, Above TA = +25oC . . . . . . . . . . . . . 7.4mW/oC CA723E, CA723CE, Above TA = +25oC . . . . . . . . . . . . 8.3mW/oC Ambient Temperature Range Operating Temperature Range . . . . . . . . . . . . . . -55oC to +125oC Storage Temperature Range . . . . . . . . . . . . . . . . -65oC to +150oC Lead Temperature, During Soldering . . . . . . . . . . . . . . . . . . +265oC At a distance 1/16” ± 1/32” (1.59mm ± 0.79mm) from case for 10s max
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.
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) CA723
PARAMETERS
TEST CONDITION
CA723C
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
-
2.3
3.5
-
2.3
4
mA
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
6.95
7.15
7.35
6.8
7.15
7.5
V
-
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
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
TA = -55oC to +125oC
-
0.002
0.015
-
-
-
%/oC
TA = 0oC to +70oC
-
-
-
-
0.003
0.015
%/oC
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
DC CHARACTERISTICS Quiescent Regulator Current, IQ
IL = 0, VI = 30V
Input Voltage Range, VI
Reference Voltage, VREF Line Regulation (Note 1)
Load Regulation (Note 1)
Output-Voltage Temperature Coefficient, ∆VO Ripple Rejection (Note 2)
VI = 12V to 40V
NOTES: 1. 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. 2. For CREF (See Figure 20)
7-4
CA723, CA723C V+
VC
UNREGULATED INPUT
R1 500Ω
R5 1kΩ
R4 1kΩ
R3 25kΩ
Q8
Q3 Q7
D3 D1 6.2V
R2 15kΩ
Q14
Q4
Q15
Q9
R12 15kΩ
R6 100Ω C1 5pF
Q1
D4 Q10
R7 30kΩ
R9 300Ω R8 5kΩ VREF
VZ
Q13
D2 6.2V
Q6
VO
Q11 Q12
Q5
R10 20kΩ
R11 150Ω
FREQUENCY COMPENSATION CURRENT LIMIT
Q16
CURRENT SENSE NON-INVERTING VINPUT
INVERTING INPUT
FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C
MAX JUNCTION TEMP (TJ) = +150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW (NO HEAT SINK)
150
AMBIENT TEMPERATURE (TA) = +25oC
100
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0.05 LOAD REGULATION (VO)
MAXIMUM LOAD CURRENT (mA)
Typical Performance Curves (CA723)
50
0 AMBIENT TEMPERATURE (TA) = +25oC -0.05 -55oC -0.1 +125oC -0.15
+125oC -0.2
0 0 10 20 30 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
40
0
FIGURE 2. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE 0.05
LOAD REGULATION (VO)
LOAD REGULATION (VO)
-55oC AMBIENT TEMP (TA) =
-0.15
100
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0.1
-0.05
-0.1
40 60 80 OUTPUT CURRENT (mA)
FIGURE 3. LOAD REGULATION WITHOUT CURRENT LIMITING
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω
0
20
+25oC
+125oC
0 AMBIENT TEMPERATURE (TA) = -55oC -0.1
0.2 +25oC -0.3
-0.2
+125oC -0.4
-0.25 0
5
10
15
20
25
0
30
OUTPUT CURRENT (mA)
FIGURE 4. LOAD REGULATION WITH CURRENT LIMITING
20
40 60 80 100 OUTPUT CURRENT (mA)
FIGURE 5. LOAD REGULATION WITH CURRENT LIMITING
7-5
CA723, CA723C Typical Performance Curves (CA723)
(Continued)
0.8
0.6
+125oC
0 0
20
40
60
+25oC
0.4
QUIESCENT CURRENT (mA)
AMBIENT TEMPERATURE (TA) = -55oC
OUTPUT VOLTAGE (V)
1.0
0.2
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω
1.2 OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CIRCUIT (IL) = 0 5 4 AMBIENT TEMPERATURE (TA) = -55oC
3
+25oC 2 +125oC
1 0
80
0
100
10
20
MAX. JUNCTION TEMP. (TJ) = +150oC THERMAL RESISTANCE = 150oC/W QUIESCENT DISSIPATION (PQ) = 60mW TO-5 STYLE PACKAGE WITH NO HEAT SINK
MAX. JUNCTION TEMP. (TJ) = +125oC THERMAL RESISTANCE = 125oC/W QUIESCENT DISSIPATION (PQ) = 60mW DUAL - IN - LINE PLASTIC PACKAGE WITH NO HEAT SINK
150
100
AMBIENT TEMPERATURE (TA) = +25oC 50
100 AMBIENT TEMPERATURE (TA) = +25oC
50
+70oC
+70oC 0
0 0
0
10 20 30 40 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
40
30
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10Ω LOAD REGULATION (VO)
AMBIENT TEMPERATURE (TA) = +25oC 0oC
+70oC
-0.1
20
FIGURE 9. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE FOR CA723CE
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 0
10
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 8. MAX LOAD CURRENT vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
LOAD REGULATION (VO)
40
FIGURE 7. QUIESCENT CURRENT vs INPUT VOLTAGE
MAXIMUM LOAD CURRENT (mA)
MAXIMUM LOAD CURRENT (mA)
FIGURE 6. CURRENT LIMITING CHARACTERISTICS
150
30
INPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
AMBIENT TEMPERATURE (TA) = +25oC
0
0oC
-0.1 +70oC
-0.2
-0.2 0
20
40 60 80 100 OUTPUT CURRENT (mA)
0
FIGURE 10. LOAD REGULATION WITHOUT CURRENT LIMITING
10 20 OUTPUT CURRENT (mA)
30
FIGURE 11. LOAD REGULATION WITH CURRENT LIMITING
7-6
CA723, CA723C
AMBIENT TEMPERATURE (TA) = +25oC
OUTPUT VOLTAGE (V)
1.0
0.8
0.6
0.4
OUTPUT VOLTAGE (VO) = REFERENCE VOLTAGE (VREF) LOAD CURRENT (IL) = 0 QUIESCENT CURRENT (mA)
1.2
(Continued)
OUTPUT VOLTAGE (VO) = 5V INPUT VOLTAGE (VI) = 12V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 10
Typical Performance Curves (CA723)
0.2
5 4
AMBIENT TEMPERATURE (TA) = +25oC
3
0oC
2
+70oC
1 +70oC
0oC
0 0
10
20 40 60 OUTPUT CURRENT (mA)
80
0
100
0
FIGURE 12. CURRENT LIMITING CHARACTERISTICS
10
20 30 INPUT VOLTAGE (V)
40
FIGURE 13. QUIESCENT CURRENT vs INPUT VOLTAGE
Typical Performance Curves (CA723 and CA723C)
0.1
0
-0.1 -0.2
-5
5
15
25
35
0
-0.2 -5 5 15 25 35 45 DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
45
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
FIGURE 14. LOAD REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
FIGURE 15. LINE REGULATION vs DIFFERENTIAL INPUTOUTPUT VOLTAGE
LOAD CURRENT (IL)
10
10
0 5
OUTPUT VOLTAGE (VO) -10
0
CURRENT LIMITING SENSE VOLTAGE (V)
INPUT VOLTAGE (V I) = 12V, OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 40mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
LOAD DEVIATION (mA)
OUTPUT VOLTAGE DEVIATION (mA)
0.1
-0.1
-0.3
15
OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = +25oC 0.3 DIFFERENTIAL INPUT VOLTAGE (∆VT) = 3V SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0 0.2
-20 5 -30
200
0.8 CURRENT LIMITING SENSE VOLTAGE
160
0.7
120
0.6 SHORT CIRCUIT LIMITING CURRENT WITH RSCP = 5Ω
80
0.5
0.4
WITH RSCP = 10Ω
0.3
10 -5
5
15
25 TIME (µs)
35
40
SHORT CIRCUIT LIMITING CURRENT (mA)
LOAD REGULATION (VO)
0.2
LINE REGULATION (VO)
INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = I TO 50mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
0 -50 0 50 100 150 JUNCTION TEMPERATURE (oC)
45
FIGURE 16. LINE TRANSIENT RESPONSE
FIGURE 17. CURRENT LIMITING CHARACTERISTIC vs JUNCTION TEMPERATURE
7-7
CA723, CA723C Typical Performance Curves (CA723 and CA723C)
(Continued)
INPUT VOLTAGE (VI) 2
4
0
2 OUTPUT VOLTAGE (VO)
-2
0 INPUT VOLTAGE (VI) = 12V OUTPUT VOLTAGE (VO) = 5V LOAD CURRENT (IL) = 1mA AMBIENT TEMPERATURE (TA) = +25oC SHORT CIRCUIT PROTECTION RESISTANCE (RSCP) = 0
-2 -4 -5
5
15
25 TIME (µs)
35
-4
OUTPUT IMPEDANCE (W)
4
6
INPUT VOLTAGE DEVIATION (V)
OUTPUT VOLTAGE DEVIATION (mA)
10
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 RESISTANCE (RSCP) = 0 1 8 6 4 LOAD CAPACITANCE (CL) = 0 2
0.1
1µF
8 6 4 2
0.01
2
-6
4 68 1k
100
45
2
4 68 2 10k
4 68 2 100k
4 6 8 1M
FREQUENCY (Hz)
FIGURE 18. LOAD TRANSIENT RESPONSE
FIGURE 19. OUTPUT IMPEDANCE vs FREQUENCY
Typical Application Circuits V+
VI
VC
VI
VREF
V+
VC
VREF
VO
VO
RSCP CURRENT LIMIT
R1 NON INV INPUT CREF
R2
RSCP REGULATED OUTPUT
R3
CURRENT R3 SENSE INV. INPUT V-
NON INV INPUT
C1 100pF
REGULATED OUTPUT 15V
CURRENT SENSE
R1
C1 100pF
INV. INPUT
V-
R2
COMP
COMP
Circuit Performance Data: Regulated Output Voltage 5V Line Regulation (∆VI= 3V) 0.5mV Load Regulation (∆IL = 50mA) 1.5mV Note: R3 =
CURRENT LIMIT
Circuit Performance Data: Line Regulation (∆VI = 3V) 1.5mV Load Regulation (∆IL = 50mA) 4.5mV R1 R2 For Minimum Temperature Drift R1 + R2 R3 May Be Eliminated For Minimum Component Count
Note: R3 =
R1 R2 For Minimum Temperature Drift R1 + R2
FIGURE 20. LOW VOLTAGE REGULATOR CIRCUIT (VO = 2V TO 7V)
FIGURE 21. HIGH VOLTAGE REGULATOR CIRCUIT (VO = 7V TO 37V)
7-8
CA723, CA723C Typical Application Circuits V+ R2
(Continued)
VC
VI
VI
VREF
R5 2kΩ
VZ
VC
V+ VREF
VO
VO
R4 3kΩ
CURRENT LIMIT CURRENT SENSE
R3 3kΩ
R1
NON INV. INPUT
V-
INV. INPUT COMP
NON INV INPUT
REGULATED OUTPUT-15V
C1 100pF
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).
V-
CURRENT R SCP LIMIT
REGULATED OUTPUT 15V
CURRENT SENSE
R1
INV. INPUT COMP C1 100pF
R2
Circuit Performance Data: Line Regulation (∆VI = 3V) 1.5mV Load Regulation (∆IL = 1A) 15mV
FIGURE 22. NEGATIVE VOLTAGE REGULATOR CIRCUIT
FIGURE 23. POSITIVE VOLTAGE REGULATOR CIRCUIT (WITH EXTERNAL n-p-n PASS TRANSISTOR)
VI
VI R3 60Ω
V+ VREF
VC
VO
2N5956 OR 2N6108
V+
VREF
VC
REGULATED OUTPUT 5V
VO R3 2.7kΩ
R1
CURRENT LIMIT CURRENT SENSE
R2
NON INV INPUT
V-
CURRENT LIMIT
R1 RSCP
INV. INPUT COMP C1 0.001µF
RSCP 30Ω R4 5.6kΩ
CURRENT SENSE
REGULATED OUTPUT 5V
R2
NON INV INPUT
V-
INV. COMP INPUT C1 0.001µF
Circuit Performance Data: Line Regulation (∆V = 3V) 0.5mV Load Regulation (∆IL = 10mA) 1mV Short Circuit Current 20mA
Circuit Performance Data: Line Regulation (∆VI = 3V) 0.5mV Load Regulation (∆IL = 1A) 5mV FIGURE 24. POSITIVE VOLTRAGE REGULATOR CIRCUIT (WITH EXTERNAL p-n-p PAS TRANSISTOR)
FIGURE 25. FOLDBACK CURRENT LIMITING CIRCUIT
7-9
CA723, CA723C Typical Application Circuits
(Continued)
R5 10kΩ
R5 3.9kΩ
V+
VC
VI = 85V V+
VC
VREF
VREF
VO VZ
R4 3kΩ
R1
D1 12V SK3062 R3 3kΩ
RSCP 1Ω
R3 3kΩ
D1 12V SK3062
NON INV. INPUT R4 3kΩ
R1
VCOMP
TI 2N6211
R2
INV. INPUT R2
R6 10kΩ
VO VZ
TI 2N3442
CURRENT LIMIT CURRENT SENSE
NON INV. INPUT
VI
C1 0.001µF
CURRENT LIMIT CURRENT SENSE INV. INPUT C1 0.001µF
V-
COMP REGULATED OUTPUT-100V
REGULATED OUTPUT-50V
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)
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 26. POSITIVE FLOATING REGULATOR CIRCUIT
FIGURE 27. NEGATIVE FLOATING REGULATOR CIRCUIT
VI VREF
VI V+
VC
VO RSCP
NOTE 2
V+
VREF
VC
VZ
REGULATED OUTPUT 5V CURRENT LIMIT
R1
NON INV INPUT
R1
R4 100Ω REGULATED OUTPUT 5V
CURRENT LIMIT CURRENT SENSE
INV. INPUT R3 COMP VC1 0.001µF
R3 100Ω
C
CURRENT SENSE R2
VO
2kΩ
TI 2N3053
R2 R4 2.kΩ
CCSL LOGIC INPUT
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.
INV INPUT
V-
NON INV. COMP INPUT C1 0.005µF
Circuit Performance Data: Line Regulation (∆VI = 10V) 0.5mV
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 28. REMOTE SHUTDOWN REGULATOR CIRCUIT WITH CURRENT LIMITING
7-10
FIGURE 29. SHUNT REGULATOR CIRCUIT
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