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
The CA723 and CA723C are silicon monolithic integrated cir-
• Up to 150mA Output Current
cuits designed for service as voltage regulators at output volt-
ages ranging from 2V to 37V at currents up to 150mA.
• 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
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 acces-
sible inputs for adjustable current limiting and remote shutdown
• Adjustable Output Voltage . . . . . . . . . . . . . . . 2V to 37V and, in addition, feature low standby current drain, low tempera-
ture drift, and high ripple rejection.
Applications
The CA723 and CA723C may be used with positive and nega-
• Series and Shunt Voltage Regulator
tive power supplies in a wide variety of series, shunt, switching,
• Floating Regulator
and floating regulator applications. They can provide regulation
• Switching Voltage Regulator
• High-Current Voltage Regulator
• Temperature Controller
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.
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
PACKAGE
14Lead Plastic DIP
10 Pin Metal Can
14 Lead Plastic DIP
10 Pin Metal Can
o
o
CA723E
-55 C to +125 C
o
o
CA723T
-55 C to +125 C
o
o
CA723CE
CA723CT
0 C to +70 C
o
o
0 C to +70 C
Pinouts
Functional Block Diagram
CA723 (PDIP)
TOP VIEW
NC
1
NC
14
13
12
FREQUENCY
COMPENSATION
V+
CURRENT
LIMIT
FREQ
COMP
2
3
4
5
6
7
UNREGULATED
INPUT
TEMPERATURE-
COMPENSATED
ZENER
V+ UNREG
INPUT
CURRENT
SENSE
INVERTING
INPUT
VC
INV
INPUT
11 VC
-
ERROR
AMP
+
-
VREF
SERIES PASS
TRANSISTOR
VOLT
REF
AMP
NON-INV
INPUT
ERROR
AMP
+
10
9
VO
VZ
VOLT
REF
VREF
V-
NON-INVERTING
INPUT
V
O REGULATED
OUTPUT
8
NC
VZ
CURRENT
LIMIT
CURRENT
SENSE
V-
CA723C (CAN)
TOP VIEW
CURRENT LIMIT
CURRENT
LIMITER
TAB
10
CURRENT
SENSE
FREQ
9
COMP
1
V+
INV
8
2
UNREG
INPUT
INPUT
+
ERROR
AMP
-
NON-INV
INPUT
3
7
VC
VOLT
REF
VREF
6
4
VO
5
V-, (CASE INTERNALLY
CONNECTED TO TERM 5)
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
File Number 788.3
Copyright © Harris Corporation 1994
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