KA431A [FAIRCHILD]
Programmable Shunt Regulator; 可编程并联稳压器
| 型号： | KA431A |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Programmable Shunt Regulator |
| 文件： | 总12页 (文件大小：92K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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KA431/KA431A/KA431L
Programmable Shunt Regulator
Features
Description
• Programmable Output Voltage to 36 Volts
• Low Dynamic Output Impedance 0.20 Typical
• Sink Current Capability of 1.0 to 100mA
• Equivalent Full-Range Temperature Coefficient of
50ppm/°C Typical
• Temperature Compensated for Operation Over Full Rated
Operating Temperature Range
• Low Output Noise Voltage
The KA431/KA431A/KA431L are three-terminal adjustable
regulator series with a guaranteed thermal stability over
applicable temperature ranges. The output voltage may be
set to any value between VREF (approximately 2.5 volts)
and 36 volts with two external resistors These devices have a
typical dynamic output impedance of 0.2W Active output
circuitry provides a very sharp turn on characteristic,
making these devices excellent replacement for zener diodes
in many applications.
• Fast Turn-on Response
TO-92
1
1. Ref 2. Anode 3. Cathode
8-DIP
8-SOP
1
1
1.Cathode 2.3.6.7.Anode
4.5.NC 8.Ref
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
Internal Block Diagram
CATHODE
REFERENCE
2.5 Vref
ANODE
CATHODE (K)
REFERENCE (R)
ANODE(A)
Rev. 1.0.6
©2002 Fairchild Semiconductor Corporation
KA431/KA431A/KA431L
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified.)
Parameter
Symbol
Value
37
Unit
V
Cathode Voltage
V
KA
KA
Cathode Current Range (Continuous)
Reference Input Current Range
I
-100 ~ +150
0.05 ~ +10
mA
mA
I
REF
Power Dissipation
D, Z Suffix Package
DIP Package
P
770
1000
mW
mW
D
Junction Temperature
T
150
°C
°C
°C
J
Operating Temperature Range
Storage Temperature Range
T
-25 ~ +85
-65 ~ +150
OPR
T
STG
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Unit
Cathode Voltage
Cathode Current
V
V
-
-
36
V
KA
KA
REF
I
1.0
100
mA
2
KA431/KA431A/KA431L
Electrical Characteristics
(T = +25°C, unless otherwise specified)
A
KA431
KA431A
KA431L
Unit
Parameter
Symbol
Conditions
=V
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
Reference Input
Voltage
V
I
,
KA REF
V
REF
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508
V
=10mA
KA
Deviation of
Reference
Input Voltage
Over-
∆VREF/ VKA=VREF,
∆T
IKA=10mA
-
-
-
-
-
-
4.5
17
4.5
17
4.5
17
mV
TMIN≤TA≤TMAX
Temperature
Ratio of Change
in Reference
Input Voltage
∆VREF/
∆VKA
∆VKA=10
V-VREF
-1.0
- 2.7
-1.0 - 2.7
-1.0
-2.7
IKA
mV/V
=10mA
to the Change in
Cathode
Voltage
∆VKA=36
-
-
-0.5
1.5
-2.0
4
-
-
-0.5
1.5
-2.0
4
-
-
-0.5
1.5
-2.0
4
V-10V
Reference Input
Current
IKA=10mA,
R1=10kΩ,R2=∞
IREF
µA
Deviation of
Reference
Input Current
Over Full
Temperature
Range
IKA=10mA,
R1=10kΩ,R2=∞
TA =Full Range
-
-
-
-
-
-
∆IREF/∆T
0.4
1.2
1.0
0.4
1.2
1.0
0.4
1.2
1.0
µA
Minimum
Cathode Cur-
rent for
IKA(MIN) VKA=VREF
0.45
0.45
0.45
mA
Regulation
Off - Stage
Cathode
Current
VKA=36V,
IKA(OFF)
-
-
0.05
0.15
1.0
0.5
-
-
0.05
0.15
1.0
0.5
-
-
0.05
0.15
1.0
0.5
µA
VREF=0
Dynamic
Impedance
VKA=VREF,
ZKA
IKA=1 to 100mA
Ω
f ≥1.0kHz
• T
= -25°C, T
= +85°C
MAX
MIN
3
KA431/KA431A/KA431L
Test Circuits
Figure 2. Test Circuit for V ≥V
KA REF
Figure 1. Test Circuit for V =V
KA REF
Figure 3. Test Circuit for l
KA(OFF)
4
KA431/KA431A/KA431L
Typical Performance Characteristics
Figure 5.
Cathode Current vs. Cathode Voltage
Figure 4.
Cathode Current vs. Cathode Voltage
Change In Reference Input Voltage vs.
Cathode Voltage
Figure 6.
Figure7. Dynamic Impedance Frequency
Pulse Response
Figure 9.
Figure 8. Small Signal Voltage Amplification vs. Frequency
5
KA431/KA431A/KA431L
Typical Performance Characteristics (Continued)
140
A
B
A VKA = Vref
120
100
80
60
40
20
0
B VKA = 5.0 V @ IK = 10mA
C VKA = 10 V @ IK = 10mA
D VKA = 15 V @ IK = 10mA
TA = 25oC
C
D
100p
1n
10n
100n
1µ
10µ
CL, LOAD CAPACITANCE
Figure 10. Stability Boundary Conditions
6
KA431/KA431A/KA431L
Typical Application
R1
VO = Vref 1 + ------
R2
R1
R1
1 + ------ Vref
R2
VO
=
1 + ------ Vref
VO =
R2
Figure 12. Output Control for
Three--Ter minal Fixed Regulator
Figure 11. Shunt Regulator
Figure 13. High Current Shunt Regulator
Figure 15. Constant-Current Sink
Figure 14. Current Limit or Current Source
7
KA431/KA431A/KA431L
Mechanical Dimensions
Package
Dimensions in millimeters
TO-92
+0.25
–0.15
4.58
0.46 ±0.10
+0.10
–0.05
1.27TYP
1.27TYP
0.38
[1.27 ±0.20
]
[1.27 ±0.20]
3.60 ±0.20
(R2.29)
8
KA431/KA431A/KA431L
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
8-DIP
6.40 ±0.20
0.252 ±0.008
#1
#4
#8
#5
3.30 ±0.30
0.130 ±0.012
5.08
0.200
MAX
7.62
3.40 ±0.20
0.134 ±0.008
0.300
0.33
0.013
MIN
0.25 +–00..1005
0.010+–00..000042
9
KA431/KA431A/KA431L
Mechanical Dimensions (Continued)
Package
Dimensions in millimeters
8-SOP
0.1~0.25
MIN
0.004~0.001
1.55 ±0.20
0.061 ±0.008
#8
#5
#1
#4
6.00 ±0.30
0.236 ±0.012
1.80
0.071
MAX
3.95 ±0.20
0.156 ±0.008
5.72
0.225
0.50 ±0.20
0.020 ±0.008
10
KA431/KA431A/KA431L
Ordering Information
Product Number
KA431LZ
KA431LD
KA431AZ
KA431AD
KA431
Output Voltage Tolerance
Package
TO-92
8-SOP
TO-92
8-SOP
8-DIP
Operating Temperature
0.5%
1%
2%
-25 ~ +85°C
KA431Z
TO-92
8-SOP
KA431D
11
KA431/KA431A/KA431L
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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8/20/02 0.0m 001
Stock#DSxxxxxxxx
2002 Fairchild Semiconductor Corporation
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