Harris CA723T Voltage regulators adjustable from 2v to 37v at output currents up to 150ma without external pass transistor Datasheet

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
Output-Voltage Temperature Coefficient, ∆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
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)
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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