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TLV431A, TLV431B,
SCV431A, SCV431B
Low Voltage Precision
Adjustable Shunt Regulator
The TLV431A and B series are precision low voltage shunt
regulators that are programmable over a wide voltage range of 1.24 V
to 16 V. The TLV431A series features a guaranteed reference accuracy
of
±1.0%
at 25°C and
±2.0%
over the entire industrial temperature
range of
−40°C
to 85°C. For TLV431B series, the accuracy is even
higher, it’s
±0.5%
and
±1.0%
respectively. These devices exhibit a
sharp low current turn−on characteristic with a low dynamic
impedance of 0.20
W
over an operating current range of 100
mA
to
20 mA. This combination of features makes this series an excellent
replacement for zener diodes in numerous applications circuits that
require a precise reference voltage. When combined with an
optocoupler, the TLV431A/B can be used as an error amplifier for
controlling the feedback loop in isolated low output voltage (3.0 V to
3.3 V) switching power supplies. These devices are available in
e c o n o m i c a l T O
−9
2
−3
a n d m i c r o s i z e T S O P
−5
a n d
SOT−23−3 packages.
Features
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TO−92
LP SUFFIX
CASE 29
12
1
2
3
STRAIGHT LEAD
BULK PACK
4
5
1
2
3
3
BENT LEAD
TAPE & REEL
AMMO PACK
•
Programmable Output Voltage Range of 1.24 V to 16 V
•
Voltage Reference Tolerance
"1.0%
for A Series and
•
•
•
•
•
•
TSOP−5
SN SUFFIX
CASE 483
"0.5%
for B Series
Sharp Low Current Turn−On Characteristic
Low Dynamic Output Impedance of 0.20
W
from 100
mA
to 20 mA
Wide Operating Current Range of 50
mA
to 20 mA
Micro Miniature TSOP−5, SOT−23−3 and TO−92−3 Packages
These are Pb−Free and Halide−Free Devices
SCV Prefix for Automotive and Other Applications Requiring
Unique Site and Control Change Requirements; AEC−Q100
Qualified and PPAP Capable
3
1
2
SOT−23−3
SN1 SUFFIX
CASE 318
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Applications
•
Low Output Voltage (3.0 V to 3.3 V) Switching Power Supply
•
•
•
•
•
Error Amplifier
Adjustable Voltage or Current Linear and Switching Power Supplies
Voltage Monitoring
Current Source and Sink Circuits
Analog and Digital Circuits Requiring Precision References
Low Voltage Zener Diode Replacements
Cathode (K)
+
-
1.24 V
ref
Anode (A)
DEVICE MARKING INFORMATION
AND PIN CONNECTIONS
See general marking information in the device marking
section on page 10 of this data sheet.
Reference (R)
Figure 1. Representative Block Diagram
©
Semiconductor Components Industries, LLC, 2012
December, 2012
−
Rev. 14
1
Publication Order Number:
TLV431A/D
TLV431A, TLV431B, SCV431A, SCV431B
Cathode (K)
Cathode (K)
Reference (R)
Reference (R)
Anode (A)
Device Symbol
Anode (A)
The device contains 13 active transistors.
Figure 2. Representative Device Symbol and Schematic Diagram
MAXIMUM RATINGS
(Full operating ambient temperature range applies, unless otherwise noted)
Rating
Cathode to Anode Voltage
Cathode Current Range, Continuous
Reference Input Current Range, Continuous
Thermal Characteristics
LP Suffix Package, TO−92−3 Package
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
SN Suffix Package, TSOP−5 Package
Thermal Resistance, Junction−to−Ambient
SN1 Suffix Package, SOT−23−3 Package
Thermal Resistance, Junction−to−Ambient
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
V
KA
I
K
I
ref
Value
18
−20
to 25
*0.05
to 10
Unit
V
mA
mA
°C/W
R
qJA
R
qJC
R
qJA
R
qJA
T
J
T
A
T
stg
178
83
226
491
150
*40
to 85
*65
to 150
°C
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE: This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883,
Method 3015. Machine Model Method 200 V.
T J(max)
*
T A
R
qJA
P
D
+
RECOMMENDED OPERATING CONDITIONS
Condition
Cathode to Anode Voltage
Cathode Current
Symbol
V
KA
I
K
Min
V
ref
0.1
Max
16
20
Unit
V
mA
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2
TLV431A, TLV431B, SCV431A, SCV431B
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted)
TLV431A/SCV431A
Characteristic
Reference Voltage (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= 25°C)
(T
A
= T
low
to T
high
, Note 1)
Reference Input Voltage Deviation Over Temperature (Figure 3)
(V
KA
= V
ref
, I
K
= 10 mA, T
A
= T
low
to T
high
, Note 1)
Ration of Reference Input Voltage Change to Cathode Voltage
Change (Figure 4)
(V
KA
= V
ref
to 16 V, I
K
= 10 mA)
Reference Terminal Current (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open)
Reference Input Current Deviation Over Temperature (Figure 4)
(I
K
= 10 mA, R1 = 10 kW, R2 = open, Notes 1, 2)
Minimum Cathode Current for Regulation (Figure 3)
Off−State Cathode Current (Figure 5)
(V
KA
= 6.0 V, V
ref
= 0)
(V
KA
= 16 V, V
ref
= 0)
Dynamic Impedance (Figure 3)
(V
KA
= V
ref
, I
K
=0.1 mA to 20 mA, f
≤
1.0 kHz, Note 3)
Symbol
V
ref
Min
1.228
1.215
−
Typ
1.240
−
7.2
Max
1.252
1.265
20
TLV431B/SCV431B
Min
1.234
1.228
−
Typ
1.240
−
7.2
Max
1.246
1.252
20
Unit
V
DV
ref
mV
DV
ref
DV
KA
I
ref
DI
ref
I
K(min
)
I
K(off)
−
−
−
−
−
−
−
−0.6
0.15
0.04
55
0.01
0.012
0.25
−1.5
0.3
0.08
80
0.04
0.05
0.4
−
−
−
−
−
−
−
−0.6
0.15
0.04
55
0.01
0.012
0.25
−1.5
0.3
0.08
80
0.04
0.05
0.4
mV
V
mA
mA
mA
mA
|Z
KA
|
W
1. Ambient temperature range: T
low
=
*40°C,
T
high
= 85°C.
2. The deviation parameters
DV
ref
and
DI
ref
are defined as the difference between the maximum value and minimum value obtained over the
full operating ambient temperature range that applied.
V
ref
Max
DV
ref
= V
ref
Max
−
V
ref
Min
V
ref
Min
T
1
Ambient Temperature
T
2
DT
A
= T
2
−
T
1
The average temperature coefficient of the reference input voltage,
aV
ref
is defined as:
(DV )
ref
V
(T
+
25°C)
ref A
DT
A
10
6
αV
ref
ppm
+
°C
aV
ref
can be positive or negative depending on whether V
ref
Min or V
ref
Max occurs at the lower ambient temperature, refer to Figure 8.
Example:
DV
ref
= 7.2 mV and the slope is positive,
Example:
V
ref
@ 25°C = 1.241 V
Example:
DT
A
= 125°C
0.0072
ppm
αV
ref
+
1.241
°C
125
3. The dynamic impedance Z
KA
is defined as:
⏐Z
DV
KA
⏐
+
KA
DI
K
10
6
+
46 ppm
°C
When the device is operating with two external resistors, R1 and R2, (refer to Figure 4) the total dynamic impedance of the circuit is given by:
⏐Z
KA
′⏐
+
⏐Z
KA
⏐
1
)
R1
R2
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3
TLV431A, TLV431B, SCV431A, SCV431B
Input
I
K
V
KA
Input
I
K
R1
V
ref
I
ref
V
KA
Input
I
K(off)
V
KA
R2
V
ref
V
KA
+
V
ref
1
)
R1
)
I
S
R1
ref
R2
Figure 3. Test Circuit
for V
KA
= V
ref
Figure 4. Test Circuit
for V
KA
u
V
ref
Figure 5. Test Circuit
for I
K(off)
30
110
90
Input
I
K
V
KA
I K , CATHODE CURRENT (mA)
20
Input
I
K
V
KA
I K , CATHODE CURRENT (
m
A)
70
50
30
10
V
KA
= V
ref
T
A
= 25°C
I
K(min)
10
V
KA
= V
ref
T
A
= 25°C
0
−10
−30
0
0.2
0.4
0.6
0.8
1.0
V
KA
, CATHODE VOLTAGE (V)
1.2
1.4
−10
−1.0
−0.5
0
0.5
1.0
V
KA
, CATHODE VOLTAGE (V)
1.5
2.0
Figure 6. Cathode Current vs. Cathode Voltage
Figure 7. Cathode Current vs. Cathode Voltage
1.25
Vref , REFERENCE INPUT VOLTAGE (V)
I ref , REFERENCE INPUT CURRENT (
m
A)
Vref
(max)
0.15
Input
I
K
10 k
I
ref
V
KA
1.24
Vref
(typ)
0.14
I
K
= 10 mA
1.23
Input
V
KA
= V
ref
I
K
= 10 mA
VKA
IK
Vref
(min)
TLV431A Typ.
85
0.13
1.22
−40
60
−15
10
35
T
A
, AMBIENT TEMPERATURE (°C)
0.12
−40
−15
10
35
60
T
A
, AMBIENT TEMPERATURE (°C)
85
Figure 8. Reference Input Voltage versus
Ambient Temperature
Figure 9. Reference Input Current versus
Ambient Temperature
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