Intersil Corporation CA723 Datasheet
CA723, CA723C
Data Sheet April 1999
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.
Ordering Information
PART
NUMBER
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
TEMP. RANGE
(oC) PACKAGE PKG. NO.
File Number
788.4
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
NC
CURRENT
LIMIT
CURRENT
SENSE
INV
INPUT
NON-INV
INPUT
V
REF
1
2
3
4
-
ERROR
AMP
+
5
VOLT
6
REF
7
V-
NC
14
FREQ
13
COMP
V+ UNREG
12
INPUT
11
V
10
V
9
V
8
NC
C
O
Z
3-3
CA723C (CAN)
TOP VIEW
CURRENT LIMIT
CURRENT
INV
INPUT
NON-INV
INPUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
SENSE
2
3
V
REF
1
+
ERROR
AMP
-
4
VOLT
REF
| Copyright © Intersil Corporation 1999
TAB
10
5
V-, (CASE INTERNALLY
CONNECTED TO TERM 5)
9
6
FREQ
COMP
8
7
V
O
V+
UNREG
INPUT
V
C
Functional Block Diagram
CA723, CA723C
UNREGULATED
INPUT
D1
6.2V
V+
TEMPERATURECOMPENSATED
ZENER
R1
500Ω
D3
R2
15kΩ
Q1
Q6
R3
25kΩ
Q3
VOLT
REF
AMP
Q4
C1
5pF
R7
30kΩ
V+
UNREGULATED
INVERTING
V
REF
NON-INVERTING
V-
R4
1kΩ
Q5
R6
100Ω
Q10
D2
6.2V
R9
300Ω
R8
5kΩ
V
REF
INPUT
INPUT
INPUT
Q7
NON-INVERTING
COMPENSATION
-
ERROR
AMP
+
CURRENT
LIMIT
Q9
R10
20kΩ
INPUT
FREQUENCY
CURRENT
SENSE
CURRENT
LIMITER
R5
1kΩ
Q12
Q11
Q13
R11
150Ω
V-
V
C
SERIES P ASS
TRANSISTOR
V
O
OUTPUT
V
Q8
Q16
INVERTING
INPUT
REGULATED
Z
R12
15kΩ
FIGURE 1. EQUIVALENT SCHEMATIC DIAGRAM OF THE CA723 AND CA723C
Q14
D4
V
C
Q15
V
V
FREQUENCY
COMPENSATION
CURRENT
LIMIT
CURRENT
SENSE
O
Z
3-4
CA723, CA723C
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 (VZ) . . . . . . . . . . . . . . . . 25mA
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 operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on an evaluation PC board in free air.
Thermal Resistance (Typical, Note 1) θJA(oC/W) θJC(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
DC Electrical Specifications T
= 25oC, V+ = VC = VI = 12V, V- = 0, VO = 5V, IL = 1mA, C1 = 100pF, C
A
REF
= 0, R
SCP
= 0,
Unless Otherwise Specified. Divider impedance R1 R2÷ R1 + R2 at noninverting input,
Terminal 5 = 10kΩ. (Figure 20)
CA723 CA723C
PARAMETER TEST CONDITION
UNITSMIN TYP MAX MIN TYP MAX
DC CHARACTERISTICS
Quiescent Regulator Current, I
Input Voltage Range, V
Output Voltage Range, V
Q
I
O
Differential Input-Output Voltage, VI - V
Reference Voltage, V
REF
IL = 0, VI = 30V - 2.3 3.5 - 2.3 4 mA
9.5 - 40 9.5 - 40 V
2 - 37 2 - 37 V
O
3 - 38 3 - 38 V
6.95 7.15 7.35 6.8 7.15 7.5 V
Line Regulation (Note 2) VI = 12V to 40V - 0.02 0.2 - 0.1 0.5 % V
VI = 12V to 15V - 0.01 0.1 - 0.01 0.1 % V
VI = 12V to 15V,
- - 0.3 - - - % V
TA = -55oC to 125oC
VI = 12V to 15V,
- - - - - 0.3 % V
TA = 0oC to 70oC
Load Regulation (Note 2) IL = 1mA to 50mA - 0.03 0.15 - 0.03 0.2 % V
IL = 1mA to 50mA,
- - 0.6 - - - % V
TA = -55oC to 125oC
IL = 1mA to 50mA,
- - - - - 0.6 % V
TA = 0oC to 70oC
Output-Voltage Temperature Coefficient,
∆V
O
TA = -55oC to 125oC - 0.002 0.015 - - - %/oC
TA = 0oC to 70oC - - - - 0.003 0.015 %/oC
Ripple Rejection (Note 3) f = 50Hz to 10kHz - 74 - - 74 - dB
Short Circuit Limiting Current, I
LIM
f = 50Hz to 10kHz,
C
= 5µF
REF
R
= 10Ω, VO = 0 - 65 - - 65 - mA
SCP
-86- -86-dB
O
O
O
O
O
O
O
3-5
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