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기능 Programmable Precision References
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SCV431A 데이터시트, 핀배열, 회로
TL431A, B Series,
NCV431A, B Series,
SCV431A
Programmable
Precision References
The TL431A, B integrated circuits are three−terminal
programmable shunt regulator diodes. These monolithic IC voltage
references operate as a low temperature coefficient zener which is
programmable from Vref to 36 V with two external resistors. These
devices exhibit a wide operating current range of 1.0 mA to 100 mA
with a typical dynamic impedance of 0.22 W. The characteristics of
these references make them excellent replacements for zener diodes in
many applications such as digital voltmeters, power supplies, and op
amp circuitry. The 2.5 V reference makes it convenient to obtain a
stable reference from 5.0 V logic supplies, and since the TL431A, B
operates as a shunt regulator, it can be used as either a positive or
negative voltage reference.
Features
Programmable Output Voltage to 36 V
Voltage Reference Tolerance: ±0.4%, Typ @ 25°C (TL431B)
Low Dynamic Output Impedance, 0.22 W Typical
Sink Current Capability of 1.0 mA to 100 mA
Equivalent Full−Range Temperature Coefficient of 50 ppm/°C Typical
Temperature Compensated for Operation over Full Rated Operating
Temperature Range
Low Output Noise Voltage
NCV/SCV Prefixes for Automotive and Other Applications
Requiring Unique Site and Control Change Requirements;
AEC−Q100 Qualified and PPAP Capable
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
www.onsemi.com
TO−92 (TO−226)
LP SUFFIX
CASE 29
Pin 1. Reference
1 23
2. Anode
3. Cathode
8
1
PDIP−8
P SUFFIX
CASE 626
Micro8E
DM SUFFIX
CASE 846A
Cathode 1
N/C 2
N/C 3
N/C 4
8 Reference
7 N/C
6 Anode
5 N/C
(Top View)
8
1
SOIC−8
D SUFFIX
CASE 751
Cathode 1
Anode
2
3
N/C 4
8 Reference
7
Anode
6
5 N/C
(Top View)
This is an internally modified SOIC−8 package. Pins 2, 3, 6 and
7 are electrically common to the die attach flag. This internal
lead frame modification increases power dissipation capability
when appropriately mounted on a printed circuit board. This
modified package conforms to all external dimensions of the
standard SOIC−8 package.
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of
this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2016
March, 2016 − Rev. 38
1
Publication Order Number:
TL431/D




SCV431A pdf, 반도체, 판매, 대치품
TL431A, B Series, NCV431A, B Series, SCV431A
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)
TL431AI /
NCV431AI/
SCV431AI
TL431AC
TL431BC / TL431BI /
TL431BV /
NCV431BV
Characteristic
Reference Input Voltage (Figure 1)
VKA = Vref, IK = 10 mA
TA = 25°C
TA = Tlow to Thigh (Note 6)
Symbol Min Typ Max Min Typ Max Min Typ Max Unit
Vref V
2.47 2.495 2.52 2.47 2.495 2.52 2.485 2.495 2.505
2.44 − 2.55 2.453 − 2.537 2.475 2.495 2.515
Reference Input Voltage Deviation Over
DVref − 7.0 30 − 3.0 17 − 3.0 17 mV
Temperature Range (Figure 1, Notes 7, 8)
VKA= Vref, IK = 10 mA
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage
IK = 10 mA (Figure 2),
DVref
DVKA
mV/V
DVKA = 10 V to Vref
− −1.4 −2.7 − −1.4 −2.7 − −1.4 −2.7
DVKA = 36 V to 10 V
− −1.0 −2.0 − −1.0 −2.0 − −1.0 −2.0
Reference Input Current (Figure 2)
IK = 10 mA, R1 = 10 k, R2 =
TA = 25°C
TA = Tlow to Thigh (Note 6)
Iref mA
− 1.8 4.0 − 1.8 4.0 − 1.1 2.0
− − 6.5 − − 5.2 − − 4.0
Reference Input Current Deviation Over
Temperature Range (Figure 2, Note 7)
IK = 10 mA, R1 = 10 k, R2 =
DIref − 0.8 2.5 − 0.4 1.2 − 0.8 2.5 mA
Minimum Cathode Current For Regulation
VKA = Vref (Figure 1)
Imin − 0.5 1.0 − 0.5 1.0 − 0.5 1.0 mA
Off−State Cathode Current (Figure 3)
VKA = 36 V, Vref = 0 V
Ioff − 20 1000 − 20 1000 − 0.23 500 nA
Dynamic Impedance (Figure 1, Note 9)
VKA = Vref, DIK = 1.0 mA to 100 mA
f 1.0 kHz
|ZKA|
− 0.22 0.5 − 0.22 0.5
− 0.14 0.3 W
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. Tlow = −40°C for TL431AIP TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431BV, TL431AIDM, TL431IDM,
TL431BIDM, NCV431AIDMR2G, NCV431AIDR2G, NCV431BVDR2G, SCV431AIDMR2G
= 0°C for TL431ACP, TL431ACLP, TL431CP, TL431CLP, TL431CD, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM,
TL431ACDM, TL431BCDM, SCV431AIDMR2G
Thigh = +85°C for TL431AIP, TL431AILP, TL431IP, TL431ILP, TL431BID, TL431BIP, TL431BILP, TL431IDM, TL431AIDM, TL431BIDM
= +70°C for TL431ACP, TL431ACLP, TL431CP, TL431ACD, TL431BCD, TL431BCP, TL431BCLP, TL431CDM, TL431ACDM,
TL431BCDM
= +125°C TL431BV, NCV431AIDMR2G, NCV431AIDR2G, NCV431BVDMR2G, NCV431BVDR2G, SCV431AIDMR2G
7. Guaranteed by design.
8. The deviation parameter DVref is defined as the difference between the maximum and minimum values obtained over the full operating
ambient temperature range that applies.
Vref max
Vref min
DVref = Vref max
-Vref min
DTA = T2 - T1
T1 Ambient Temperature T2
The average temperature coefficient of the reference input voltage, aVref is defined as:
ǒ Ǔppm
Vref _C +
D Vref
Vref @ 25_C
D TA
X 106
+
D Vref x 106
D TA (Vref @ 25_C)
aVref can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature. (Refer to Figure 6.)
Example : DVref + 8.0 mV and slope is positive,
Vref @ 25_C + 2.495 V, DTA + 70_C
0.008 x 106
a Vref + 70 (2.495) + 45.8 ppmń_C
9.
The
dynamic
impedance
ZKA
is
defined
as
|ZKA|
+
D VKA
D IK
When
the
device
is
programmed
with
two
external
resistors,
R1
and
R2,
(refer
ǒ Ǔto Figure 2) the total dynamic impedance of the circuit is defined as: |ZKAȀ| [ |ZKA|
1
)
R1
R2
10. NCV431AIDMR2G, NCV431AIDR2G, NCV431BVDMR2G, NCV431BVDR2G, SCV431AIDMR2G Tlow = −40°C, Thigh = +125°C.
NCV prefix is for automotive and other applications requiring unique site and control change requirements.
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SCV431A 전자부품, 판매, 대치품
TL431A, B Series, NCV431A, B Series, SCV431A
3.0 TA = 25°C
2.0
Output
1.0
0
5.0
0 Input
Input
Monitor 220 Output
Pulse
Generator 50
f = 100 kHz
GND
0 4.0 8.0 12 16 20
t, TIME (ms)
Figure 14. Pulse Response
140
Unstable Programmed
120 Area
A
B
100 C
VKA(V)
Vref
5.0
10
D 15
80
C
TA = 25°C
60 Stable
D
Stable
40 B B
20 A
A
0
1.0 nF
10 nF
100 nF 1.0 mF
10 mF
100 mF
CL, LOAD CAPACITANCE
Figure 15. Stability Boundary Conditions
150
IK
V+
CL
150
IK
V+
10 k
CL
Figure 16. Test Circuit For Curve A
of Stability Boundary Conditions
Figure 17. Test Circuit For Curves B, C, And D
of Stability Boundary Conditions
TYPICAL APPLICATIONS
V+ Vout
R1
R2
ǒ ǓVout +
1
)
R1
R2
 Vref
Figure 18. Shunt Regulator
V+ Vout
R1
R2
ǒ ǓVout +
1
)
R1
R2
 Vref
Figure 19. High Current Shunt Regulator
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SCV431A

Programmable Precision References

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