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Fairchild |
KA723
Precision Voltage Regulator
www.fairchildsemi.com
Features
• Positive or Negative Supply Operation
• 0.01% line and load regulation
• Output voltage adjustable from 2V to 37 V
• Output current to 150mA without external pass transistor
Description
The KA723 are monolithic integrated Circuit voltage regu-
lators featuring high ripple rejection, excellent output and
load regulation, excellent temperature stability, and low
standby current. The KA723 are also useful in a wide range
of other applications such as a shunt regulator, a current reg-
ulator or a temperature controller.
14-DIP
1
14-SOP
Internal Block Diagram
TEMP.
COMPENS
ZENER
1
+Vcc
12
INVERT
INPUT
4
FREQUENCY
COMPENS
12 11
Vo
REF
AMP
ERROR
AMP
VREF
6 75
-Vcc
NON
INVERT
INPUT
53
CURRENT CURRENT
LIMIT SENSE
9
Vz
Vo
©2000 Fairchild Semiconductor International
Rev. 5.0
KA723
Absolute Maximum Ratings
Parameter
Pulse Voltage from V+ to V- (50ms)
Continuous Voltage from V+ to V-
Input-Output Voltage Differential
Maximum Output Current
Differential Input Voltage
Voltage Between Non-Inverting Input and V-
Current from VZ
Current from VREF
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
VI(P)
VI
VI - VO
IO
VID
VIE
IZ
IREF
PD
TOPR
TSTG
Value
50
40
40
150
±5
8
25
15
1000
0 ~ +70
-65 ~ + 150
Unit
VPEAK
V
V
mA
V
V
mA
mA
mV
°C
°C
Electrical Characteristics
(Unless otherwise specified, TA = 25°C, VIN =V+= VC = 12V, V-=O,VOUT = 5V, IL =1mA, RSC = 0, CI = 100pF, CREF=0 and
divider impedance as seen by error amplifier ≤10KΩ connected as shown in figure 1)
Parameter
Line Regulation
Load Regulation
Ripple Rejection
Average Temperature Coefficient of
Output Voltage
Short Circuit Current Limit
Reference Voltage
Output Noise Voltage
Long-term Stability
Standby Current Drain
Input Voltage Range
Output Voltage Range
Input-Output Voltage Differential
Symbol
∆VO
∆VO
dB
∆VO/∆T
ISC
VREF
VN
ST
ID
VI
VO
VD
Conditions
Min
VI = 12V to 15V
VI = 12V to 40V
-
TMIN ≤TA≤TMAX
VI = 12V to 15V
-
IO = 1mA to 50mA
-
TMIN ≤T≤TMAX
IO = 1 to 50mA
-
f = 100Hz to 10KHz,CREF =0
-
f = 100Hz to 10KHz,CREF =5µF -
Typ.
0.01
0.1
-
0.03
-
74
86
Max.
0.1
0.5
0.3
0.2
0.6
-
-
TMIN ≤T≤TMAX
- 0.003 0.015
RSC = 10Ω, VO = 0
- 65
- 6.80 7.15
f = 100Hz to 10KHz, CREF = 0 - 20
f = 100Hz to 10KHz, CREF=5µF - 2.5
-
7.50
-
-
- - 0.1 -
IL = 0, VI = 30V
-
-
-
- 2.0 4.0
9.5 - 40
2.0 - 37
3.0 - 38
Unit
%
%
dB
%/°C
mA
V
µVms
%/
1000HR
mA
V
V
V
Notes:
1.Line and load regulation specifications are given for the condition of constant chip temperature.
2.Temperature drifts must be taken into account separately for hith dissipation conditions.
2
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