TS431
Adjustable shunt voltage reference IC (automotive for SOT23-5)
Z
TO92
(plastic package)
L
SOT23-5
(plastic micropackage)
Datasheet
-
production data
Description
The TS431 is a low-voltage, three-terminal, adjustable shunt voltage reference. The output voltage can be set to any value between V ref
(1.24 V) and 6 V using two external resistors. The
TS431 is able to operate at a lower voltage (1.24
V) and lower cathode current than the widelyused TL431 and TL1431 shunt voltage reference.
When driving an optocoupler, the TS431 is particularly suitable for regulating 3.3 V switching power supplies.
Features
AEC-Q100 qualified (SOT23-5)
Low voltage operation: 1.24 to 6 V
2%, 1% and 0.5% voltage precision
Wide operating range cathode current: 60 µA to 30 mA
Low output impedance: 0.2 Ω
Typically stable for any capacitive loads
ESD protection:
Human body model: 2 kV
– Machine model: 200 V
100 ppm/°C temperature coefficient
Automotive grade version available
June 2018
This is information on a product in full production.
DocID5558 Rev 12 1/16 www.st.com
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5
6
7
1
2
3
Contents
Contents
TS431
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Definition of output voltage change over temperature range . . . . . . . . . . . . . . . . . 5
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1
SOT23-5 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.2
TO92 (tape ammopack and tape and reel) package information . . . . . . . 12
5.3
TO92 (bulk) package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 DocID5558 Rev 12
TS431
1 Pinout
Figure 1. Pinout Z TO92 (plastic package)
Pinout
Figure 2. Pinout L SOT23-5 (plastic micropackage)
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16
Absolute maximum ratings and operating conditions
2
TS431
Absolute maximum ratings and operating conditions
Symbol
V
KA
I k
I ref
P
T d stg
Table 1. Absolute maximum ratings
Parameter
Cathode to anode voltage
Continuous cathode current range
Reference input current range
Power dissipation
TO92 package
SOT23-5 package
Storage temperature range
Value
10
-20 to +40
-0.05 to +3
625
500
-65 to +150
Symbol
Table 2. Operating conditions
Parameter
V
KA
I k
T oper
Cathode to anode voltage
Cathode current
(1)
Operating free air temperature range
1. Please refer to Section 4: Application information
for more details.
Symbol
R thJC
R thJA
Table 3. Thermal data
Parameter
Thermal resistance junction to case
Thermal resistance junction to ambient
TO-92
57
200
Value
1.24 to 6
0.06 to 30
-40 to +125
Unit
V mA
°C
SOT23-5L
136
250
Unit
°C/W
°C/W
Unit
V mA mA mW
°C
4/16 DocID5558 Rev 12
TS431 Electrical characteristics
Symbol
Table 4. T amb
= 25 °C (unless otherwise specified)
Parameter Test conditions Min.
Typ.
Max.
Unit
V ref
V ref
I
Output voltage
V
KA
= V ref
at I k
= 100 A
Output voltage change k
= 100 A, V
KA
= V ref
(1) (2)
TS431
TS431A
TS431B
0 < T amb
< +70 °C
-40 < T amb
< +85 °C
-40 < T amb
< +105 °C
-40 < T amb
< +125 °C
1.215
1.228
1.234
-
-
-
-
1.240
1.240
1.240
-
-
-
-
1.265
1.252
1.246
9
16
18
21
V mV
Ratio of change in reference input voltage to change in cathode to anode voltage
I k
= 10 mA
V
KA
= 6 V to V ref
1.8
2.7
mV/V
I
I ref ref
Reference input current
Reference input current deviation over temperature range
I k
= 10 mA
I k
= 10 mA, R
1
= 10 k R
2
=
-40 < T amb
-40 < T amb
< +85 °C
< +125 °C
-
-
70
70
90
160
160
240 nA nA
I min
Minimum cathode current for regulation
V
KA
= V ref
40 60 A
I off
R
KA
Off-state cathode current
Static impedance
V
KA
= 6 V, V
V
KA
= V ref
, I k ref
= 0
= 0.1 to 15 mA -
0.001
0.2
0.1
0.4
1. Limits are 100% production tested at 25 °C. Behavior at the temperature range limits is guaranteed through correlation and by design.
2. See definition below.
A
Definition of output voltage change over temperature range
V ref
is defined as the difference between the maximum and minimum values obtained over the full temperature range.
V ref
= V ref max
- V ref min
Figure 3. Output voltage change over temperature range
Vref max.
Vref min.
T1 T2
Temperature
DocID5558 Rev 12 5/16
16
Electrical characteristics TS431
Figure 4. Reference voltage vs. temperature
1.252
1.248
Vka = Vref
Ik = 100 µA
1.244
1.24
1.236
1.232
1.228
-40 -20 0 20 40 60 80 100 120
Temperature (°C)
Input
Figure 5. Test circuit for V
Vref
Ik
KA
= V ref
Vka
Output
Figure 6. Cathode voltage vs. cathode current Figure 7. Cathode voltage vs. cathode current
1.5
15
10
Vka = Vref
T = 25°C
1
5
0
-5
-10
-15
-1 -0.5
0 0.5
Vka Cathode voltage (V)
1 1.5
0.5
0
0
-40°C +25°C
10
+85°C
+125°C
20 30 40
Ika Cathode current (µA)
50 60
Figure 8. Reference input current vs. temperature
100
80
Ik = 10mA
R1 = 10 K
R2 = +
60
Figure 9. Static impedance vs. temperature
0.4
0.3
Vka = Vref
Ik = 100µA to 15mA
0.2
40
0.1
20
0
-40 -20 0 20 40 60
Temperature (°C)
80 100 120
0
-40 -20 0 20 40 60
Temperature (°C)
80 100 120
6/16 DocID5558 Rev 12
TS431
200
Figure 10. Off-state current vs. temperature
150
100
50
0
-40 -20 0 20 40 60
Temperature (°C)
80 100 120
Figure 12. Ratio of change in reference input voltage to change in V
KA temperature
voltage vs.
0
Electrical characteristics
Figure 11. Test circuit for off-state current measurement
Input Vka=6V
Ioff
Figure 13. Test circuit for V
Input
KA
> V ref
Vka
Ik
-1
R1
Iref
-2
Ik = 10mA
Vka = 6V to Vref
R2
Vref
-3
-40 -20 0 20 40 60
Temperature (°C)
80 100 120
Figure 14. Phase and gain vs. frequency
60
50
40
30
Phase
20
10
0
1E+3
Gain
1E+4 1E+5
Frequency (Hz)
-50
-100
-150
1E+6
50
0
150
100
Vka = Vref . (1+R1/R2) + Iref . R1
Figure 15. Test circuit for phase and gain measurement
Input
10µF
6.8K
Ik=100µA
4.3K
Vref
10µF
Output
DocID5558 Rev 12 7/16
16
Electrical characteristics
Figure 16. Pulse response at I k
= 100 µA
Input voltage
3
2
1
Output voltage
0
0 1 2 3 4 5
Time (µs)
6 7 8 9 10
Figure 18. Pulse response at I k
= 1 mA
Input voltage
3
Pulse
Generator f=100KHz
50
18K
Ik=100µA
Figure 19. Test circuit for pulse response at
I k
= 1 mA
1.8K
TS431
Figure 17. Test circuit for pulse response at
I k
= 100 µA
Ik=1mA
2
1
Output voltage
Pulse
Generator f=100KHz
50
0
0 1 2 3 4
Time (µs)
5 6 7
Figure 20. Equivalent input noise vs. frequency
250
200
150
100
50
0
0.1
Vka = Vref
Ik = 100 µA
T=25°C
1 10
Frequency (KHz)
100 1000
8/16 DocID5558 Rev 12
TS431 Application information
The TS431 is a general-purpose low-power adjustable shunt voltage reference, capable of operating with a cathode current as low as 60 µA and up to 30 mA.
The main static parameters of the TS431 voltage reference are specified in
Table 4 on page 5
.
Since the TS431 is designed for general-purpose applications with a broad range of cathode currents, voltages and loads, when designing with the device in applications requiring fast dynamic response (turn-on/off and/or pulsed load conditions) it should be considered that upon application of power, the time required for the V
KA
voltage to reach its final value within a specified error range depends on several factors, among which the temperature, cathode current and capacitive load inrush current are the most influential. The dynamic response of the device to fast turn-on/off, load and temperature changes is optimized when the cathode current is not in the lower end of the operating range
(I
K
> 500 µA).
DocID5558 Rev 12 9/16
16
Package information TS431
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
® specifications, grade definitions and product status are available at: www.st.com
.
ECOPACK
®
is an ST trademark.
10/16 DocID5558 Rev 12
TS431
information
Figure 21. SOT23-5 package outline
Package information
.
Symbol
H
E
C
D
A
A1
A2 b e e1
L
Min.
0.09
2.80
2.60
1.50
0.90
0.00
0.90
0.35
-
-
0.35
Table 5. SOT23-5 package mechanical data
Dimensions
Millimeters Inches
Typ.
-
-
-
-
-
-
-
-
0.95
1.9
-
Max.
0.20
3.00
3.00
1.75
1.45
0.15
1.30
0.50
-
-
0.55
Min.
0.035
0.00
0.035
0.014
0.003
0.110
0.102
0.059
-
-
0.014
Typ.
-
-
-
-
-
-
-
-
0.037
0.075
-
Max.
0.057
0.006
0.051
0.02
0.008
0.118
0.118
0.069
-
-
0.022
DocID5558 Rev 12 11/16
16
Package information
5.2 TO92 (tape ammopack and tape and reel) package information
Figure 22. TO92 (tape ammopack and tape and reel) package outline
A1
P
P
T
H
TS431 d
12/16
D0
P2
F1 F2
P0
W1
W2
H
H0
H1
DO
L1 d
I1
P
PO
AL
A
T
P2
F1/F2
h
P
W
W0
Table 6. TO92 (tape ammopack and tape and reel) package mechanical data
Dimensions (millimeters) Dimensions (Inches)
Symbol
Min.
5.95
2.4
-1
-1
17.5
5.7
8.5
-
-
15.5
-
3.8
-
-
2.5
11.7
12.4
-
-
-
Typ.
6.35
2.5
0
0
18.0
6
9
-
-
16
-
4.0
-
0.45
-
12.7
12.7
-
-
-
Max.
6.75
2.8
1
1
19.0
6.3
9.75
0.5
20
16.5
25
4.2
11
5.0
5.0
4.0
-
-
13.7
13
Min.
0.234
0.094
-0.039
-0.039
0.689
0.224
0.335
-
-
-
-
-
0.098
0.461
0.488
-
0.610
-
0.150
-
Typ.
0.250
0.098
0
0
0.709
0.236
0.354
-
-
-
-
0.018
-
0.500
0.500
-
0.630
-
0.157
-
Max.
0.266
0.110
0.039
0.039
0.748
0.248
0.384
0.020
0.197
0.197
0.157
-
-
0.539
0.512
0.787
0.650
0.984
0.165
0.433
DocID5558 Rev 12
TS431
5.3 TO92 (bulk) package information
Figure 23. TO92 (bulk) package outline
Package information
C
K
O2 a
L
B
O1
Symbol
Min.
-
3.2
4.45
4.58
12.7
0.407
0.35
Table 7. TO92 (bulk) package mechanical data
Dimensions
Millimeters
Typ.
1.27
3.7
5.00
5.03
-
0.5
-
Max.
-
4.2
5.2
5.33
-
0.508
-
Min.
-
0.126
0.1752
0.1803
0.5
0.016
0.0138
Inches
Typ.
0.05
0.1457
0.1969
0.198
-
0.0197
-
Max.
-
0.1654
0.2047
0.2098
-
0.02
-
DocID5558 Rev 12 13/16
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Ordering information TS431
Order codes Precision
Table 8. Order codes
Temp. range Packages Packing Marking
TS431ILT
TS431AILT
TS431BILT
TS431IYLT
(1)
TS431AIYLT
(1)
TS431BIYLT
(1)
TS431IZ/IZT/IZ-AP
2%
1%
0.5%
2%
1%
0.5%
2%
-40 °C, + 125 °C
SOT23-5
SOT23-5
(automotive grade level)
Tape and reel
L272
L271
L270
L274
L276
L273
TS431I
TS431AIZ/AIZT/AIZ-AP
TS431BIZ/BIZT/BIZ-AP
1%
0.5%
TO92
Bulk (Z), tape and reel (ZT) or ammopack (AP)
TS431AI
TS431BI
1. Qualification and characterization according to AEC-Q100 and AEC-Q003 or equivalent, advanced screening according to
AEC-Q001 and AEC-Q002 or equivalent.
14/16 DocID5558 Rev 12
TS431 Revision history
Date
1-Sep-2003
1-Oct-2005
2-Jan-2006
22-Sep-2006
25-Apr-2007
30-Aug-2007
27-Aug-2010
15-Nov-2012
17-Dec-2012
12-Mar-2013
30-Nov-2017
27-Jun-2018
Revision
1
2
3
4
5
6
7
8
9
10
11
12
Table 9. Document revision history
Changes
Initial release.
PPAP references inserted in the datasheet. See the order codes table.
Minor changes to formatting and grammar.
TS431AIYLT PPAP reference inserted. See the order codes table.
Included footnote on automotive grade qualification to order codes table.
Updated package information (changed mils to inches).
Resized graphics on cover page.
Moved definition of output voltage change from Table 3 footnote to separate section below table.
Corrected errors in SOT23-5 package mechanical data.
Removed erroneous drawing for TO92 tape & reel package.
Updated drawing for TO92 bulk package.
Modified footnote related to automotive grade qualification in
Table 5: Order codes
, and re-ordered order codes.
Modified note for package SOT23-5 on page 1.
Modified note 1 Table 5 on page 12 .
Added note 1
Table 2 on page 2
and
Section 3 on page 7
.
Added features Automotive grade version available in cover page.
Added automotive qualification for SOT23-5 in the whole document.
Updated main title on page 1.
Added Section 1: Pinout on page 3.
Updated Table 1 on page 4 (removed note 1).
Added Table 3 on page 4.
Minor modifications throughout document.
Added precision value in
Table 8: Order codes
.
DocID5558 Rev 12 15/16
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TS431
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16/16 DocID5558 Rev 12
