TL431ACZX [FAIRCHILD]
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| 型号： | TL431ACZX |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | 暂无描述 稳压器 |
| 文件： | 总10页 (文件大小：89K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
TL431/TL431A
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 TL431/TL431Aare three-terminal adjustable regulator
series with a guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any
value between V
REF
(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 excel lent replacement for zener diodes in many
applications.
• Fast Turn-on Response
TO-92
1
1. Ref 2. Anode 3. Cathode
8-DIP
1
1.Cathode 2.3.4.5.7.NC
6.Anode 8.Ref
8-SOP
1
1. Cathode 2. 3. 6. 7. Anode
8. Ref 4. 5. NC
Rev. 1.0.3
©2003 Fairchild Semiconductor Corporation
TL431/TL431A
Internal Block Diagram
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, LP Suffix Package
P Suffix Package
P
770
1000
mW
mW
D
Operating Temperature Range
Junction Temperature
T
-25 ~ +85
150
°C
°C
°C
OPR
T
J
Storage Temperature Range
T
-65 ~ +150
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
TL431/TL431A
Electrical Characteristics
(T = +25°C, unless otherwise specified)
A
TL431
TL431A
Parameter
Symbol
Conditions
Unit
Min. Typ. Max. Min. Typ. Max.
Reference Input Voltage
V
V
V
=V
, I =10mA
2.440 2.495 2.550 2.470 2.495 2.520
V
REF
KA REF KA
Deviation of Reference
Input Voltage Over-
Temperature (Note 1)
∆V
/
/
=V
, I =10mA
MAX
∆V =10V-
-
-
REF
KA REF KA
4.5
- 10
-0.5
1.5
17
-2.7
-2.0
4
4.5
-1.0
-0.5
1.5
17
-2.7
-2.0
4
mV
∆T
∆V
T
≤T ≤T
MIN
A
Ratio of Change in
Reference Input Voltage
REF
KA
KA
-
-
-
-
-
-
∆V
V
REF
I
KA
=10mA
mV/V
to the Change in
Cathode Voltage
∆V =36V-
KA
10V
I
=10mA,
KA
Reference Input Current
I
µA
REF
R =10KΩ,R =∞
1
2
Deviation of Reference
Input Current Over Full
Temperature Range
I
=10mA,
KA
1
R =10KΩ,R =∞
T
-
-
2
∆I
/∆T
0.4
1.2
1.0
1.0
0.4
1.2
1.0
1.0
µA
mA
µA
REF
=Full Range
A
Minimum Cathode Cur-
rent for Regulation
I
V
=V
KA REF
-
-
0.45
0.05
-
-
0.45
0.05
KA(MIN)
Off - Stage Cathode
Current
V
V
=36V,
KA
I
KA(OFF)
=0
REF
V
=V ,
KA REF
Dynamic Impedance
(Note 2)
Z
I
=1 to 100mA
KA
-
0.15
0.5
-
0.15
0.5
Ω
KA
f ≥1.0KHz
• T
= -25 °C, T = +85 °C
MIN MAX
3
TL431/TL431A
Test Circuits
TL431/A
TL431/A
Figure 2. Test Circuit for V ≥V
KA REF
Figure 1. Test Circuit for V =V
KA REF
TL431/A
Figure 3. Test Circuit for l
KA(OFF)
4
TL431/TL431A
Typical Perfomance Characteristics
Figure 1. Cathode Current vs. Cathode Voltage
Figure 2. Cathode Current vs. Cathode Voltage
Figure 3. Change In Reference Input Voltage vs.
Cathode Voltage
Figure 4. Dynamic Impedance Frequency
Figure 5. Small Signal Voltage Amplification vs. Frequency
Figure 6. Pulse Response
5
TL431/TL431A
Typical Application
R1
R1
R1
VO = Vref 1 + ------
VO
=
1 + ------ Vref
VO
=
1 + ------ Vref
R2
R2
R2
MC7805/LM7805
TL431/A
TL431/A
TL431/A
Figure 10. Shunt Regulator
Figure 11. Output Control for Three-
Termianl Fixed Regulator
Figure 12. High Current Shunt Regula-
tor
TL431/A
TL431/A
Figure 13. Current Limit or Current Source
Figure 14. Constant-Current Sink
6
TL431/TL431A
Mechanical Dimensions
Package
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)
7
TL431/TL431A
Mechanical Dimensions (Continued)
Package
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 +–0.10
0.05
0.010+–0.004
0.002
°
0~15
8
TL431/TL431A
Mechanical Dimensions (Continued)
Package
8-SOP
0.1~0.25
0.004~0.001
MIN
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
9
TL431/TL431A
Ordering Information
Product Number
TL431ACLP
TL431ACD
TL431CLP
TL431CP
Output Voltage Tolerance
Package
TO-92
8-SOP
TO-92
8-DIP
Operating Temperature
1%
-25 ~ + 85oC
2%
TL431CD
8-SOP
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.
www.fairchildsemi.com
8/4/03 0.0m 001
Stock#DSxxxxxxxx
2003 Fairchild Semiconductor Corporation
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