LM431ACZXA [ONSEMI]
可调式/2.5V、2%容差分流稳压器;型号: | LM431ACZXA |
厂家: | ONSEMI |
描述: | 可调式/2.5V、2%容差分流稳压器 输出元件 稳压器 |
文件: | 总9页 (文件大小:308K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Programmable Shunt
Regulator
LM431A, LM431B, LM431C
Description
The LM431A/LM431B/LM431C are three−terminal output
adjustable regulators with thermal stability over the full operating
temperature range. The output voltage can be set to any value between
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V
REF
(approximately 2.5 V) and 36 V with two external resistors.
These devices have a typical dynamic output impedance of 0.2 W.
Active output circuit provides a sharp turn−on characteristic, making
these devices excellent replacements for Zener diodes in many
applications.
Features
1
2
3
1
2
3
• Programmable Output Voltage to 36 V
• Low Dynamic Output Impedance: 0.2 W (Typical)
• Sink Current Capability: 1.0 to 100 mA
• Equivalent Full−Range Temperature Coefficient of 50 ppm/°C
(Typical)
TO−92
CASE 135AN
TO−92
CASE 135AR
MARKING DIAGRAM
• Temperature Compensated for Operation Over Full Rated
Operating Temperature Range
• Low Output Noise Voltage
• Fast Turn−on Response
LM431
XXXX
ALYW
LM431XXXX = Specific Device Code
A
L
= Assembly Location
= Wafer Lot
YW
= Assembly Start Week
PIN CONNECTIONS
Figure 1. Block Diagram
1 − Ref
2 − Anode
3 − Cathode
1 2 3
1
2
3
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
© Semiconductor Components Industries, LLC, 2003
1
Publication Order Number:
April, 2021 − Rev. 3
LM431A/D
LM431A, LM431B, LM431C
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
37
Unit
V
V
Cathode Voltage
KA
KA
I
Cathode Current Range (Continuous)
Reference Input Current Range
Power Dissipation
−100 to +150
−0.05 to +10
770
mA
mA
mW
°C/W
°C
I
REF
P
D
R
Thermal Resistance, Junction to Ambient
Operating Temperature Range − LM431xC
Operating Temperature Range − LM431xI
Junction Temperature
160
θ
jA
T
OPR
−25 to +85
−40 to +85
150
°C
T
°C
J
T
STG
Storage Temperature Range
−65 to +150
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
36
Unit
V
V
Cathode Voltage
Cathode Current
V
REF
KA
KA
I
1.0
100
mA
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
ELECTRICAL CHARACTERISTICS (Values are at T = 25°C unless otherwise noted)
A
LM431A
Typ
LM431B
Typ
LM431C
Typ Max
Min
Max
Min
Max
Min
Symbol
Parameter
Conditions
= V , I = 10 mA
Unit
V
REF
Reference Input
Voltage
V
V
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508
V
KA
REF KA
DV
/DT Deviation of
= V , I =10 mA
REF KA
−
4.5
17.0
−
4.5
17.0
−
4.5
17.0
mV
REF
KA
Reference Input
Voltage Over−
Temperature
T
≤ T ≤ T
(Note 1)
MIN
A
MAX
DV
/
Ratio of Change in
Reference Input
Voltage to the
Change in Cathode
Voltage
I
= 10 mA
mV/V
DV
=
REF
−
−
−1.0 −2.7
−0.5 −2.0
−
−
−1.0 −2.7
−0.5 −2.0
−
−
−1.0 −2.7
−0.5 −2.0
REF
KA
KA
KA
DV
10 V−V
DV
=
KA
36 V−10 V
= 10 mA, R1 = 10 kW,
KA
I
Reference Input
Current
I
−
−
1.5
0.4
4.0
1.2
−
−
1.5
0.4
4.0
1.2
−
−
1.5
0.4
4.0
1.2
mA
mA
REF
R2 = ∞
DI
REF
/DT Deviation of
I
KA
= 10 mA, R1 = 10 kW,
Reference Input
R2 = ∞, T = Full Range
A
Current Over Full
Temperature Range
Minimum Cathode
Current for
−
0.45 1.00
−
0.45 1.00
−
0.45 1.00
mA
I
I
V
= V
KA(MIN)
KA REF
Regulation
Off − Stage
Cathode Current
V
V
= 36 V, V
= 0
−
−
−
−
−
−
0.05 1.00
0.15 0.50
0.05 1.00
0.15 0.50
0.05 1.00
0.15 0.50
mA
KA
REF
KA(OFF)
Dynamic
Impedance
= V
, I = 1 to 100
W
Z
KA
KA
REF KA
mA,
f ≥ 1.0 kHz
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. LM431xC: T
= −25°C, T
= +85°C
MIN
MAX
LM431xI: T
= −40°C, T
= +85°C
MIN
MAX
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2
LM431A, LM431B, LM431C
TEST CIRCUIT
LM431A
Figure 2. Test Circuit for VKA= VREF
LM431A
Figure 3. Test Circuit for VKA . VREF
LM431A
Figure 4. Test Circuit for IKA(OFF)
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3
LM431A, LM431B, LM431C
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 5. Cathode Current vs. Cathode Voltage
Figure 6. Cathode Current vs. Cathode Voltage
Figure 7. Change in Reference Input
Voltage vs. Cathode Voltage
Figure 8. Dynamic Impedance Frequency
Figure 9. Small Signal Voltage Amplification
vs. Frequency
Figure 10. Pulse Response
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4
LM431A, LM431B, LM431C
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
140
A
B
A VKA = Vref
120
100
80
60
40
20
0
B VKA = 5.0 V @ IK = 10 mA
C VKA = 10 V @ IK= 10 mA
D VKA = 15 V @ IK = 10 mA
C
T
A = 25oC
D
100p
1n
10n
100n
1u
10u
CL, LOAD CAPACITANCE
Figure 11. Stability Boundary Conditions
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5
LM431A, LM431B, LM431C
TYPICAL APPLICATION
LM431A
LM431A
R1
R1
+ ǒ1 ) Ǔ
@ ǒ1 ) Ǔ
VO
@ VREF
VO + VREF
R2
R2
Figure 12. Shunt Regulator
Figure 13. Output Control for Three−Terminal
Fixed Regulator
LM431A
LM431A
R1
VREF
+ ǒ1 ) Ǔ
VO
@ VREF
IO +
R2
RCL
Figure 14. High−Current Shunt Regulator
Figure 15. Current Limit or Current Source
LM431A
VREF
IO
+
RS
Figure 16. Constant−Current Sink
ORDERING INFORMATION
Operating Temperature
Range
Output Voltage
Tolerance
†
Part Number
LM431CCZ
LM431BCZX
LM431BCZXA
LM431ACZ
LM431ACZX
LM431BIZX
LM431AIZ
Tom Mark
LM431CCZ
LM431BCZ
LM431BCZ
LM431ACZ
LM431ACZ
LM431BIZ
LM431AIZ
Package
TO−92
TO−92
TO−92
TO−92
TO−92
TO−92
TO−92
Packing Method
−25 ~ +85°C
0.5%
1%
Bulk
Tape and Reel
Ammo
2%
Bulk
Tape and Reel
Tape and Reel
Bulk
−40 ~ +85°C
1%
2%
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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6
MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS
TO−92 3 4.825x4.76
CASE 135AN
ISSUE O
DATE 31 JUL 2016
Electronic versions are uncontrolled except when accessed directly from the Document Repository.
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.
DOCUMENT NUMBER:
DESCRIPTION:
98AON13880G
TO−92 3 4.825X4.76
PAGE 1 OF 1
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically
disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the
rights of others.
© Semiconductor Components Industries, LLC, 2019
www.onsemi.com
MECHANICAL CASE OUTLINE
PACKAGE DIMENSIONS
TO−92 3 4.83x4.76 LEADFORMED
CASE 135AR
ISSUE O
DATE 30 SEP 2016
Electronic versions are uncontrolled except when accessed directly from the Document Repository.
Printed versions are uncontrolled except when stamped “CONTROLLED COPY” in red.
DOCUMENT NUMBER:
DESCRIPTION:
98AON13879G
TO−92 3 4.83X4.76 LEADFORMED
PAGE 1 OF 1
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries.
ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically
disclaims any and all liability, including without limitation special, consequential or incidental damages. ON Semiconductor does not convey any license under its patent rights nor the
rights of others.
© Semiconductor Components Industries, LLC, 2019
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onsemi,
, and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates
and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.
A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi reserves the right to make changes at any time to any
products or information herein, without notice. The information herein is provided “as−is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the
information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use
of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products
and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information
provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/or specifications can and do vary in different applications and actual performance may
vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license
under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems
or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should
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