3-3
File Number
788.4
CA723, CA723C
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
Pinouts
CA723 (PDIP)
TOP VIEW
CA723C (CAN)
TOP VIEW
Ordering Information
PART
NUMBER
TEMP. RANGE
(
o
C)
PACKAGE
PKG. NO.
CA0723E
-55 to 125
14 Ld PDIP
E14.3
CA0723T
-55 to 125
10 Pin Can
T10.C
CA0723CE
0 to 70
14 Ld PDIP
E14.3
14
13
12
11
10
9
8
7
6
5
4
3
2
1
+
NC
V-
NON-INV
INPUT
V
REF
CURRENT
SENSE
CURRENT
LIMIT
INV
INPUT
V
C
V
O
V
Z
NC
NC
FREQ
COMP
INPUT
V+ UNREG
-
AMP
ERROR
VOLT
REF
+
TAB
CURRENT LIMIT
NON-INV
INPUT
INV
INPUT
CURRENT
SENSE
FREQ
COMP
V+
6
5
4
3
V
REF
V
O
7 V
C
8
2
1
9
10
UNREG
INPUT
-
V-, (CASE INTERNALLY
CONNECTED TO TERM 5)
AMP
ERROR
VOLT
REF
Data Sheet
April 1999
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
|
Copyright
Intersil Corporation 1999
3-4
Functional Block Diagram
V+
VOLT
REF
AMP
+
ERROR
AMP
INVERTING
INPUT
NON-INVERTING
INPUT
TEMPERATURE-
COMPENSATED
ZENER
UNREGULATED
INPUT
FREQUENCY
COMPENSATION
CURRENT
LIMITER
CURRENT
SENSE
CURRENT
LIMIT
SERIES PASS
TRANSISTOR
V-
V
Z
OUTPUT
V
O
REGULATED
V
C
V
REF
-
FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C
V+
UNREGULATED
INPUT
D1
6.2V
R2
15k
R1
500
R3
25k
D3
Q3
Q4
Q5
Q1
Q6
C1
5pF
R7
30k
R8
5k
D2
6.2V
V
REF
R6
100
Q10
R9
300
R10
20k
Q9
Q7
R4
1k
R5
1k
Q8
Q14
Q15
Q11 Q12
R11
150
Q13
Q16
R12
15k
D4
V
Z
FREQUENCY
COMPENSATION
V
O
V
C
CURRENT
LIMIT
CURRENT
SENSE
NON-INVERTING
INPUT
V-
INVERTING
INPUT
CA723, CA723C
3-5
Absolute Maximum Ratings
Thermal Information
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 (V
Z
) . . . . . . . . . . . . . . . . 25mA
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . -55
o
C to 125
o
C
Thermal Resistance (Typical, Note 1)
JA
(
o
C/W)
JC
(
o
C/W)
PDIP Package . . . . . . . . . . . . . . . . . . .
120
N/A
Metal Can. . . . . . . . . . . . . . . . . . . . . . .
136
65
Device Dissipation
CA723T, Up to T
A
= 25
o
C . . . . . . . . . . . . . . . . . . . . . . . . .900mW
CA723E, CA723CE, Up to T
A
= 25
o
C . . . . . . . . . . . . . . .1000mW
CA723T, Above T
A
= 25
o
C . . . . . . . . . . . . . . . . . . . . . . 7.4mW/
o
C
CA723E, CA723CE, Above T
A
= 25
o
C . . . . . . . . . . . . 8.3mW/
o
C
Maximum Storage Temperature Range . . . . . . . . . . -65
o
C to 150
o
C
Maximum Lead Temperature, During Soldering . . . . . . . . . . 265
o
C
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.
NOTE:
1.
JA
is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
T
A
= 25
o
C, V+ = V
C
= V
I
= 12V, V- = 0, V
O
= 5V, I
L
= 1mA, C
1
= 100pF, C
REF
= 0, R
SCP
= 0,
Unless Otherwise Specified. Divider impedance R
1
R
2
R
1
+ R
2
at noninverting input,
Terminal 5 = 10k
. (Figure 20)
PARAMETER
TEST CONDITION
CA723
CA723C
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
DC CHARACTERISTICS
Quiescent Regulator Current, I
Q
I
L
= 0, V
I
= 30V
-
2.3
3.5
-
2.3
4
mA
Input Voltage Range, V
I
9.5
-
40
9.5
-
40
V
Output Voltage Range, V
O
2
-
37
2
-
37
V
Differential Input-Output Voltage, V
I
- V
O
3
-
38
3
-
38
V
Reference Voltage, V
REF
6.95
7.15
7.35
6.8
7.15
7.5
V
Line Regulation (Note 2)
V
I
= 12V to 40V
-
0.02
0.2
-
0.1
0.5
% V
O
V
I
= 12V to 15V
-
0.01
0.1
-
0.01
0.1
% V
O
V
I
= 12V to 15V,
T
A
= -55
o
C to 125
o
C
-
-
0.3
-
-
-
% V
O
V
I
= 12V to 15V,
T
A
= 0
o
C to 70
o
C
-
-
-
-
-
0.3
% V
O
Load Regulation (Note 2)
I
L
= 1mA to 50mA
-
0.03
0.15
-
0.03
0.2
% V
O
I
L
= 1mA to 50mA,
T
A
= -55
o
C to 125
o
C
-
-
0.6
-
-
-
% V
O
I
L
= 1mA to 50mA,
T
A
= 0
o
C to 70
o
C
-
-
-
-
-
0.6
% V
O
Output-Voltage Temperature Coefficient,
V
O
T
A
= -55
o
C to 125
o
C
-
0.002
0.015
-
-
-
%/
o
C
T
A
= 0
o
C to 70
o
C
-
-
-
-
0.003
0.015
%/
o
C
Ripple Rejection (Note 3)
f = 50Hz to 10kHz
-
74
-
-
74
-
dB
f = 50Hz to 10kHz,
C
REF
= 5
F
-
86
-
-
86
-
dB
Short Circuit Limiting Current, I
LIM
R
SCP
= 10
, V
O
= 0
-
65
-
-
65
-
mA
CA723, CA723C
3-6
Equivalent Noise RMS Output Voltage, V
N
(Note 3)
BW = 100Hz to 10kHz,
C
REF
= 0
-
-20
-
-
20
-
V
BW = 100Hz to 10kHz,
C
REF
= 5
F
-
2.5
-
-
2.5
-
V
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 C
REF
(See Figure 20)
DC Electrical Specifications
T
A
= 25
o
C, V+ = V
C
= V
I
= 12V, V- = 0, V
O
= 5V, I
L
= 1mA, C
1
= 100pF, C
REF
= 0, R
SCP
= 0,
Unless Otherwise Specified. Divider impedance R
1
R
2
R
1
+ R
2
at noninverting input,
Terminal 5 = 10k
. (Figure 20) (Continued)
PARAMETER
TEST CONDITION
CA723
CA723C
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
Typical Performance Curves (CA723)
FIGURE 2. MAX LOAD CURRENT vs DIFFERENTIAL INPUT-
OUTPUT VOLTAGE
FIGURE 3. LOAD REGULATION WITHOUT CURRENT LIMITING
FIGURE 4. LOAD REGULATION WITH CURRENT LIMITING
FIGURE 5. LOAD REGULATION WITH CURRENT LIMITING
MAX JUNCTION TEMP (T
J
) = 150
o
C
THERMAL RESISTANCE = 150
o
C/W
QUIESCENT DISSIPATION (PQ) = 60mW
(NO HEAT SINK)
150
100
50
0
MAXIMUM LOAD CURRENT (mA)
AMBIENT TEMPERATURE (T
A
) = 25
o
C
125
o
C
0
10
20
30
40
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 0
INPUT VOLTAGE (V
I
) = 12V
LOAD REGULATION (V
O
)
0.05
0
-0.05
-0.1
-0.15
-0.2
AMBIENT TEMPERATURE
-55
o
C
125
o
C
0
20
40
60
80
100
OUTPUT CURRENT (mA)
(T
A
) = 25
o
C
-55
o
C
125
o
C
0.05
0
-0.05
-0.1
-0.15
-0.2
-0.25
LOAD REGULATION (V
O
)
OUTPUT CURRENT (mA)
0
5
10
15
20
25
30
AMBIENT TEMP (T
A
) = 25
o
C
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 10
INPUT VOLTAGE (V
I
) = 12V
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 0
INPUT VOLTAGE (V
I
) = 12V
0.1
0
-0.1
0.2
-0.3
-0.4
0
20
40
60
80
100
AMBIENT TEMPERATURE (T
A
) = -55
o
C
25
o
C
125
o
C
LOAD REGULATION (V
O
)
CA723, CA723C
3-7
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
LIMITING
FIGURE 11. LOAD REGULATION WITH CURRENT LIMITING
Typical Performance Curves (CA723)
(Continued)
AMBIENT TEMPERATURE (T
A
) = -55
o
C
125
o
C
25
o
C
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)
1.2
1.0
0.8
0.6
0.4
0.2
0
20
40
60
80
100
0
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 10
INPUT VOLTAGE (V
I
) = 12V
OUTPUT VOLTAGE (V
O
) = REFERENCE
LOAD CIRCUIT (I
L
) = 0
VOLTAGE (V
REF
)
QUIESCENT CURRENT (mA)
INPUT VOLTAGE (V)
5
4
3
2
1
0
0
10
20
30
40
AMBIENT TEMPERATURE (T
A
) = -55
o
C
25
o
C
125
o
C
MAX. JUNCTION TEMP. (T
J
) = 150
o
C
QUIESCENT DISSIPATION (P
Q
) = 60mW
TO-5 STYLE PACKAGE WITH NO HEAT SINK
THERMAL RESISTANCE = 150
o
C/W
AMBIENT TEMPERATURE (T
A
) = 25
o
C
70
o
C
150
100
50
0
MAXIMUM LOAD CURRENT (mA)
0
10
20
30
40
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
150
100
50
0
0
10
20
30
40
DIFFERENTIAL INPUT - OUTPUT VOLTAGE (V)
MAXIMUM LOAD CURRENT (mA)
70
o
C
AMBIENT TEMPERATURE (T
A
) = 25
o
C
MAX. JUNCTION TEMP. (T
J
) = 125
o
C
QUIESCENT DISSIPATION (P
Q
) = 60mW
DUAL - IN - LINE PLASTIC PACKAGE
THERMAL RESISTANCE = 125
o
C/W
WITH NO HEAT SINK
AMBIENT TEMPERATURE (T
A
) = 25
o
C
70
o
C
0
o
C
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 0
INPUT VOLTAGE (V
I
) = 12V
LO
AD REGULA
TION (V
O
)
0
-0.1
-0.2
0
20
40
60
80
100
OUTPUT CURRENT (mA)
AMBIENT TEMPERATURE (T
A
) = 25
o
C
70
o
C
0
o
C
OUTPUT VOLTAGE (V
O
) = 5V
SHORT CIRCUIT PROTECTION
RESISTANCE (R
SCP
) = 10
INPUT VOLTAGE (V
I
) = 12V
0
-0.1
-0.2
LO
AD REGULA
TION (V
O
)
OUTPUT CURRENT (mA)
0
10
20
30
CA723, CA723C
PDF 
ZIP