LM431SCCMLX [ONSEMI]
可调/2.5 V,0.5% 允差分路稳压器;型号: | LM431SCCMLX |
厂家: | ONSEMI |
描述: | 可调/2.5 V,0.5% 允差分路稳压器 稳压器 |
文件: | 总12页 (文件大小:260K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LM431SA, LM431SB,
LM431SC
Programmable Shunt
Regulator
Description
The LM431SA / LM431SB / LM431SC are three−terminal the
output adjustable regulators with thermal stability over operating
temperature range. The output voltage can be set any value between
www.onsemi.com
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 replacement for zener diodes in many
applications.
1. Ref
2. Anode
3. Cathode
1
SOT−89
CASE 528AH
Features
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)
1. Cathode
2. Ref
3. Anode
2
1
SOT−23FL
CASE 419BD
3
• Temperature Compensated for Operation Over Full Rated Operating
Temperature Range
M32
1. Ref
2. Cathode
3. Anode
M3
1. Cathode
2. Ref
2
1
• Low Output Noise Voltage
• Fast Turn−on Response
3. Anode
SOT−23
CASE 318BM
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
ORDERING INFORMATION
Output Voltage
Tolerance
Operating
Temperature
(1)
†
Top Mark
Product Number
LM431SACMFX
LM431SACM3X
LM431SACM32X
LM431SBCMLX
LM431SBCMFX
LM431SBCM3X
LM431SBCM32X
LM431SCCMLX
LM431SCCMFX
LM431SCCM3X
LM431SCCM32X
LM431SAIMFX
LM431SBIMFX
LM431SCIMFX
Package
Shipping
−25 to +85_C
Tape and Reel
2%
43A □
43L ◎
43G ◎
43B
SOT−23FL 3L
SOT−23 3L
SOT−23 3L
SOT−89 3L
SOT−23FL 3L
SOT−23 3L
SOT−23 3L
SOT−89 3L
SOT−23FL 3L
SOT−23 3L
SOT−23 3L
SOT−23FL 3L
SOT−23FL 3L
SOT−23FL 3L
1%
43B □
43M ◎
43H ◎
43C
0.5%
43C □
43N ◎
43J ◎
43AI
−40 to +85_C
2%
1%
43BI
0.5%
43CI
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
1. SOT−23 and SOT−23FL have basically four−character marking except LM431SAIMFX. (3 letters for device code + 1 letter for date code)
SOT−23FL date code is composed of 1 digit numeric or alphabetic week code adding bar−type year code.
© Semiconductor Components Industries, LLC, 2018
1
Publication Order Number:
July, 2018 − Rev. 8
LM431SA/D
LM431SA, LM431SB, LM431SC
Block Diagram
Figure 1. Block Diagram
ABSOLUTE MAXIMUM RATINGS (T = 25°C unless otherwise noted)
A
Symbol
Parameter
Value
37
Unit
V
Cathode Voltage
V
KA
KA
I
Cathode current Range (Continuous)
Reference Input Current Range
−100 to +150
−0.05 to +10.00
220
mA
mA
°C/W
I
REF
R
ML Suffix Package (SOT−89)
MF Suffix Package (SOT−23FL)
M32, M3 Suffix Package (SOT−23)
ML Suffix Package (SOT−89)
MF Suffix Package (SOT−23FL)
M32, M3 Suffix Package (SOT−23)
θ
JA
(2, 3)
Thermal Resistance Junction−Air
350
400
(4, 5)
Power Dissipation
P
D
mW
560
350
310
T
Junction Temperature
150
°C
°C
J
All products except LM431SAIMFX
LM431SAIMFX, SBIMFX, SCIMFX
−25 to +85
−40 to +85
−65 to +150
Operating Temperature Range
T
OPR
Storage Temperature Range
°C
T
STG
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.
2. Thermal resistance test board
Size: 1.6 mm x 76.2 mm x 114.3 mm (1S0P) JEDEC Standard: JESD51−3, JESD51−7.
3. Assume no ambient airflow.
4. T
= 150°C; ratings apply to ambient temperature at 25°C.
JMAX
5. Power dissipation calculation: PD = (T − T ) / R
θ
JA
.
J
A
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min.
Max.
36
Unit
V
Cathode Voltage
Cathode Current
V
V
REF
KA
KA
1
100
mA
I
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.
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2
LM431SA, LM431SB, LM431SC
ELECTRICAL CHARACTERISTICS (Note 6, Values are at T = 25°C unless otherwise noted)
A
LM431SA
LM431SB
LM431SC
Symbol
Parameter
Conditions
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit
Reference Input
Voltage
VREF
VKA = VREF, IKA = 10 mA
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508
V
SOT−89
SOT−23FL
4.5
6.6
17.0
24
4.5
6.6
17.0
24
4.5
6.6
17.0 mV
Deviation of Refer-
ence Input Voltage
Over− Tempera-
ture
VKA = VREF,
IKA = 10 mA
TMIN ≤ TA ≤ TMAX
DV
/ DT
REF
SOT−23
24
mV
DV
=
KA
Ratio of Change in
Reference Input
Voltage to the
Change in Cath-
ode Voltage
−1.0 −2.7
−0.5 −2.0
−1.0 −2.7
−0.5 −2.0
−1.0 −2.7
−0.5 −2.0
10 V−VREF
DV
DV
/
REF
KA
mV/V
IKA =10 mA
DV
=
KA
36 V − 10 V
Reference Input
Current
μA
IREF
1.5
4.0
1.5
4.0
1.5
4.0
IKA = 10 mA, R1 = 10 KW, R2 = ∞
SOT−89
SOT−23FL
Deviation of Refer-
ence Input Current
Over Full Temper-
ature Range
IKA = 10 mA,
R1 = 10 KW,
R2 = ∞,
TA = Full Range
μA
μA
0.4
0.8
1.2
2.0
0.4
0.8
1.2
2.0
0.4
0.8
1.2
2.0
DI
REF
/ DT
SOT−23
Minimum Cathode
Current for Regu-
lation
IKA(MIN)
0.45 1.00
0.45 1.00
0.45 1.00 mA
VKA = VREF
Off −Stage Cath-
ode Current
μA
IKA(OFF)
ZKA
VKA = 36 V, VREF = 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
VKA = VREF, IKA = 1 to 100 mA,
f ≥ 1.0 kHz
W
Dynamic Imped-
ance
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.
6. LM431SAI, LM431SBI, LM431SCI: − TA(min) = −40_C, TA(max) = +85_C
All other pins: − TA(min) = −25_C, TA(max) = +85_C
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3
LM431SA, LM431SB, LM431SC
ELECTRICAL CHARACTERISTICS (Continued) (Notes 7 and 8, Values are at T = 25°C unless otherwise noted)
A
LM431SAI
LM431SBI
LM431SCI
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
Symbol
Parameter
Conditions
Unit
Reference Input
Voltage
VKA = VREF, IKA = 10 mA
2.450 2.500 2.550 2.470 2.495 2.520 2.482 2.495 2.508
V
V
REF
Deviation of Refer-
ence Input Voltage
Over−Temperature
V
VKA = VREF, IKA = 10 mA, TMIN ≤ TA ≤
TMAX
REF(dev)
5
20
5
20
5
20
mV
DV = 10 V−VREF
−1.0 −2.7
−0.5 −2.0
−1.0 −2.7
−0.5 −2.0
−1.0 −2.7
−0.5 −2.0
KA
Ratio of Change in
Reference Input Volt-
age to Change in
Cathode Voltage
DV
DV
/
REF
KA
mV/V
μA
IKA = 10 mA
DV = 36 V − 10 V
KA
Reference Input
Current
IKA = 10 mA, R1 =10 KW, R2 = ∞
1.5
0.8
4.0
2.0
1.5
0.8
4.0
2.0
1.5
0.8
4.0
2.0
I
REF
Deviation of Refer-
ence Input Current
Over Full Temperature
Range
IKA = 10 mA, R1 = 10 KW, R2 = ∞,
TMIN ≤ TA ≤ TMAX
μA
I
REF(dev)
Minimum Cathode
Current for Regulation
0.45 1.00
0.05 1.00
0.15 0.50
0.45 1.00
0.05 1.00
0.15 0.50
0.45 1.00 mA
I
VKA = VREF
KA(MIN)
Off −Stage Cathode
Current
VKA = 36 V, VREF = 0
0.05 1.00
0.15 0.50
μA
I
KA(OFF)
VKA = VREF, IKA = 1 to 100 mA,
Dynamic Impedance
W
ZKA
f ≥ 1.0 kHz
7. LM431SAI, LM431SBI, LM431SCI: − TA(min) = −40_C, TA(max) = +85_C
All other pins: − TA(min) = −25_C, TA(max) = +85_C
8. The deviation parameters VREF(dev) and IREF(dev)are defined as the differences between the maximum and minimum values obtained over the
rated temperature range. The average full−range temperature coefficient of the reference input voltage, αVREF, is defined as:
V
REF(dev)
6
ǒ
Ǔ@ 10
V
(at 25°C)
REF
ppm
|ǒ Ǔ+
°C
where T
−T
is the rated operating free−air temperature range
|aVREF
MAX
MIN
TMAX * TMIN
of the device.
can be positive or negative, depending on whether minimum
aV
REF
V
or maximum
V
, respectively, occurs at the lower
REF
REF
V
V
REF(min)
temperature.
Example:
V
REF(dev)
V
T
= 4.5 mV, V
= 2500 mV at 25°C,
REF(dev)
REF
−T
MIN
= 125°C for LM431SAI.
MAX
REF(max)
4.5 mV
6
ǒ
Ǔ@ 10
2500 mV
|aVREF| +
+ 14.4 ppmń°C
125°C
TMAX -TMIN
Because minimum V
coefficient is positive.
occurs at the lower temperature, the
REF
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4
LM431SA, LM431SB, LM431SC
TEST CIRCUITS
LM431S
LM431S
Figure 2. Test Circuit for VKA = VREF
Figure 3. Test Circuit for VKA . VREF
LM431S
Figure 4. Test Circuit for IKA(OFF)
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5
LM431SA, LM431SB, LM431SC
TYPICAL APPLICATIONS
R1
+ ǒ1 ) Ǔ
R2
R1
+ ǒ1 ) Ǔ
R2
VO
Vref
VO
Vref
LM7805/MC7805
LM431S
LM431S
Figure 5. Shunt Regulator
Figure 6. Output Control for Three−Terminal Fixed
Regulator
R1
R2
+ ǒ1 ) Ǔ
VO
Vref
LM431S
Figure 7. High Current Shunt Regulator
LM431S
LM431S
Figure 9. Constant−Current Sink
Figure 8. Current Limit or Current Source
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6
LM431SA, LM431SB, LM431SC
TYPICAL PERFORMANCE CHARACTERISTICS
150
100
50
800
V
T
= V
REF
KA
V
T
= V
KA REF
= 25°C
600
400
200
0
A
= 25°C
A
I
KA(MIN)
0
−50
−100
−200
−2
−1
0 1
2
3
−1
0
1
2
3
V
KA
− Cathode Voltage (V)
V
KA
− Cathode Voltage (V)
Figure 10. Cathode Current vs. Cathode Voltage
Figure 11. Cathode Current vs. Cathode Voltage
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
−50
−25
0
25
50
75
100
125
−50 −25
0
25
50
75
100
125 150
T − Ambient Temperature (°C)
A
o
T −AmbientTemperature (°C)
A
Figure 13. Reference Input Current vs. Ambient
Temperature
Figure 12. OFF−State Cathode Current vs. Ambient
Temperature
6
60
T
= 25°C
A
T
A
= 25°C
50
40
30
20
10
0
INPUT
I
= 10 mA
KA
5
4
3
2
OUTPUT
1
0
−10
0
4
8
12
16
20
1k
10k
100k
1M
10M
Frequency (Hz)
Time (ms)
Figure 15. Pulse Response
Figure 14. Frequency vs. Small Signal Voltage
Amplification
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7
LM431SA, LM431SB, LM431SC
5
140
120
100
80
A. V = Vref
KA
4
3
2
1
0
B. V = 5.0 V @ I = 10 mA
KA
K
A
T
A
= 25°C
60
40
20
B
0
100p
1n
10n
100n
1?
10?
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
C − Load Capacitance
L
Anode−Ref. Voltage (V)
Figure 17. Anode−Reference Diode Curve
Figure 16. Stability Boundary Conditions
5
4
3
2
1
2.51
2.50
2.49
2.48
2.47
2.46
0
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
−50
−25
0
25
50
75
100
125
Ref.−Cathode Voltage (V)
T − Ambient Temperature (°C)
A
Figure 19. Reference Input Voltage vs. Ambient
Temperature
Figure 18. Reference−Cathode Diode Curve
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8
LM431SA, LM431SB, LM431SC
PACKAGE DIMENSIONS
SOT−23
CASE 318BM
ISSUE O
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9
LM431SA, LM431SB, LM431SC
PACKAGE DIMENSIONS
SOT−23FL
CASE 419BD
ISSUE O
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10
LM431SA, LM431SB, LM431SC
PACKAGE DIMENSIONS
SOT−89 3 LEAD
CASE 528AH
ISSUE O
4.70
4.30
A
C
2.23 MIN
0.50 X 45
5.30 MIN
0.30 X 45
1.87
1.45
C
B
1.40
C
SYMM
L
2.70
2.30
C
90
4.50
3.90
C
1
2
3
1.30
0.89
2.00 MIN
0.52
C
(2X)
0.30
0.10
0.54
1
2
3
M
C A B
1.50
0.90 MIN 2X
0.96 MIN
3.00
1.50
3.00 MIN
1.70
1.30
C
LAND PATTERN
RECOMMENDATION
SEATING PLANE
C
0.60
0.40
C
0.50
0.35
0.35
3
1
2.29
2.13
2.70
NOTES: UNLESS OTHERWISE SPECIFIED.
A. REFERENCE TO JEDEC TO-243 VARIATION AA.
B. ALL DIMENSIONS ARE IN MILLIMETERS.
C
DOES NOT COMPLY JEDEC STANDARD VALUE.
D. DIMENSIONS ARE EXCLUSIVE OF BURRS,
MOLD FLASH AND TIE BAR PROTRUSION.
E. DIMENSION AND TOLERANCE AS PER ASME
Y14.5−1994.
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11
LM431SA, LM431SB, LM431SC
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◊
LM431SA/D
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