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TS431
Low voltage adjustable shunt reference
Features

Low voltage operation: 1.24 to 6V 2%, 1% and 0.5% voltage precision Wide operating range cathode current: 60A to 30mA Low output impedance: 0.2 Typically stable for any capacitive loads ESD protection: Human body model: 2kV Machine model: 200V 100ppm/C temperature coefficient
Z TO-92 (Plastic Package)
L SOT23-5 (Plastic Micropackage)
Description
The TS431 is a low-voltage, three-terminal, programmable shunt voltage reference. The output voltage can be set to any value between Vref (1.24V) and 6V with two external resistors. The TS431 is able to operate at a lower voltage (1.24V) and lower cathode current than the widely used TL431 and TL1431 shunt voltage reference.
Part number TS431ILT SOT23-5 TS431AILT TS431AIYLT(1) TS431BILT TS431BIYLT(1) TS431IYLT(1) TS431IZ/IZT/IZ-AP TS431AIZ/AIZT/AIZ-AP TS431BIZ/BIZT/BIZ-AP TO-92 Bulk (Z), Tape & reel (ZT) or Ammo pack (AP) -40, + 125C SOT23-5 (automotive grade level) SOT23-5 SOT23-5 (automotive grade level) SOT23-5 (automotive grade level) Tape & reel L271 L276 L270 L273 L274 TS431I TS431AI TS431BI Temperature range
When driving an optocoupler, the TS431 is particularly useful for regulating 3.3V switching power supplies.
Package Packing Marking L272
1. Qualified and characterized according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent.
October 2006
Rev 4
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Contents
TS431
Contents
1 2 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 3.2 3.3 3.4 SOT23-5 package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 TO-92 (tape & reel) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 TO92 (tape ammo pack) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 TO92 (bulk) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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TS431
Absolute maximum ratings and operating conditions
1
Absolute maximum ratings and operating conditions
Table 1.
Symbol VKA Ik Iref Pd Tstd
Absolute maximum ratings
Parameter Cathode to anode voltage Continuous cathode current range Reference input current range Power dissipation(1) TO92 package SOT23-5 package Storage temperature range Value 10 -20 to +40 -0.05 to +3 625 500 -65 to +150 Unit V mA mA mW C
1. Tjunction=150C, Tamb=25C with RTHj-a=200C/W for TO92 package and RTHj-a=250C/W for SOT23-5L package
Table 2.
Symbol VKA Ik Toper
Operating conditions
Parameter Cathode to anode voltage Cathode current Operating free air temperature range Value 1.24 to 6 0.06 to 30 -40 to +125 Unit V mA C
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Electrical characteristics
TS431
2
Table 3.
Symbol Vref
Electrical characteristics
Tamb = 25C (unless otherwise specified)
Parameter Output voltage VKA = Vref @ Ik = 100A Output voltage change (1) (2) Ik = 100A, VKA = Vref Test conditions TS431 TS431A TS431B 0 < Tamb < +70C -40 < Tamb < +85C -40 < Tamb < +105C -40 < Tamb < +125C 1.8 70 70 90 40 0.001 0.2 Min. 1.215 1.228 1.234 Typ. 1.240 Max. 1.265 1.252 1.246 9 16 18 21 2.7 160 160 240 60 0.1 0.4 Unit V
Vref
mV
Vref --------------Vka
Ratio of change in reference input IK = 10mA voltage to change in cathode to VKA = 6V to Vref anode voltage Reference input current Reference input current deviation over temperature range Minimum cathode current for regulation Off-state cathode current Static impedance IK = 10mA IK=10mA, R1=10k, R2= -40 < Tamb < +85C -40 < Tamb < +125C VKA = Vref VKA = 6V, Vref = 0 VKA = Vref, IK = 0.1 to 15mA
mV/V nA nA
Iref Iref
Imin Ioff RKA
2.
A A
1. Limits are 100% production tested at 25C. Limits over temperature are guaranteed through correlation and by design. Vref is defined as the difference between the maximum and minimum values obtained over the full temperature range. Vref = Vref max. - Vref min.
Vref m ax.
Vref m in .
T1
T2
T e m p e r a tu r e
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TS431
Electrical characteristics
Figure 1.
1.252
Reference voltage vs. temperature
Figure 2.
Input
Test circuit for Vka = Vref
Output Ik
1.248 Reference voltage (V)
Vka = Vref Ik = 100 A
1.244
1.24
Vka
1.236
1.232 1.228 -40 -20 0 20 40 60 80 100 120 Temperature (C)
Vref
Figure 3.
15
Cathode voltage vs. cathode current
Figure 4.
1.5
Cathode voltage vs. cathode current
10 Ika Cathode current (mA)
Vka Cathode voltage (V)
Vka = Vref T = 25C
5
1
0
-5
0.5
+125C -40C +25C +85C
-10 -15 -1 -0.5 0 0.5 1 1.5 Vka Cathode voltage (V)
0 0 10 20 30 40 50 60 Ika Cathode current (A)
Figure 5.
100
Reference input current vs. temperature
Figure 6.
0.4
Static impedance vs. temperature
Iref Reference current (nA)
80
Rka Static Impedance (Ohms)
Ik = 10mA R1 = 10 K R2 = +
0.3
60
Vka = Vref Ik = 100A to 15mA
0.2
40
0.1
20
0 -40 -20 0 20 40 60 80 100 120 Temperature (C)
0 -40 -20 0 20 40 60 80 100 120 Temperature (C)
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Electrical characteristics
TS431
Figure 7.
200
Off-state current vs. temperature
Figure 8.
Test circuit for off-state current measurement
Vka=6V Ioff
Input
IOff Off-State current (nA) 150
100
50
0 -40 -20 0 20 40 60 80 100 120 Temperature (C)
Figure 9.
Ratio of change in reference input Figure 10. Test circuit for Vka > Vref voltage to change in Vka voltage vs. temperature
Input Vka
Ratio of change in reference input voltage (mV/V)
0
Ik
-1
R1 Iref
Ik = 10mA Vka = 6V to Vref
-2
R2
Vref
-3 -40 -20 0 20 40 60 80 100 120 Temperature (C)
Vka = Vref . (1+R1/R2) + Iref . R1
Figure 11. Phase and gain vs. frequency
60 150
Figure 12. Test circuit for phase and gain measurement
Phase
50 100
10F Output Ik=100A
40 Gain (dB)
50
30
Phase margin # 50
0
Phase ()
6.8K 10F
20
-50
Gain
10 0 1E+3
Input
-100 -150 1E+6
4.3K
Vref
1E+4
1E+5
Frequency (Hz)
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TS431
Electrical characteristics
Figure 13. Pulse response at Ik=100A
Figure 14. Test circuit for pulse response at Ik=100A
Input voltage
3 input and output voltage (V)
18K Ik=100A
2
Output voltage
1
50
0 0 1 2 3 4 5 Time (s) 6 7 8 9 10
Figure 15. Pulse response at Ik=1mA
Figure 16. Test circuit for pulse response at Ik=1mA
Input voltage
3 input and output voltage (V)
1.8K Ik=1mA
2
Intput
Output voltage
1
50
0 0 1 2 3 4 5 6 7 Time (s)
Figure 17. Equivalent input noise vs. frequency
250
Equivalent input noise (nv/VHz)
200
150
100
Vka = Vref Ik = 100 A T=25C
50
0 0.1 1 10 Frequency (KHz) 100 1000
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Output
Pulse Generator f=100KHz
Output
Pulse Generator f=100KHz
Intput
Package mechanical data
TS431
3
Package mechanical data
In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com.
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TS431
Package mechanical data
3.1
SOT23-5 package
Dimensions Ref. Min. A A1 A2 b C D E E1 e e1 L 0.35 0.90 0.00 0.90 0.35 0.09 2.80 2.60 1.50 0.95 1.9 0.55 0.014 Millimeters Typ. Max. 1.45 0.15 1.30 0.50 0.20 3.00 3.00 1.75 Min. 0.035 0.00 0.035 0.014 0.003 0.110 0.102 0.059 0.037 0.075 0.022 Inches Typ. Max. 0.057 0.006 0.051 0.02 0.008 0.118 0.118 0.069
.
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Package mechanical data
TS431
3.2
TO-92 (tape & reel) package
Dimensions Ref. Min. A b D E e e1 L R S1 W 4.32 0.36 4.45 3.30 2.41 1.14 12.7 2.16 0.92 0.41 Millimeters Typ. Max. 4.95 0.51 4.95 3.94 2.67 1.40 15.49 2.41 1.52 0.56 Min. 0.170 0.014 0.175 0.130 0.095 0.045 0.500 0.085 0.036 0.016 Inches Typ. Max. 0.195 0.020 0.195 0.155 0.105 0.055 0.610 0.095 0.060 0.022
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TS431
Package mechanical data
3.3
TO92 (tape ammo pack) package
A1 P P T H
d
A
H1
H0
H
I1
W0
D0 F1 F2 P2 P0
W2 W1 W
L1
Millimeters Dim. Min. AL A T d I1 P PO P2 F1/F2 h P W W0 W1 W2 H H0 H1 DO L1 3.8 4.0 15.5 16 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.150 0.610 0.45 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 Typ. Max. 5.0 5.0 4.0 Min.
Inches Typ. Max. 0.197 0.197 0.157 0.018
0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354
0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787
0.630
0.650 0.984
0.157
0.165 0.433
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Package mechanical data
TS431
3.4
TO92 (bulk) package
Millimeters Dim. Min. L B O1 C K O2 a 3.2 4.45 4.58 12.7 0.407 0.35 0.5 0.508 Typ. 1.27 3.7 5.00 5.03 4.2 5.2 5.33 0.126 0.1752 0.1803 0.5 0.016 0.0138 Max. Min.
Inches Typ. 0.05 0.1457 0.1969 0.198 0.1654 0.2047 0.2098 Max.
0.0197
0.02
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TS431
Revision history
4
Revision history
Table 4.
Date 1-Sep-2003 1-Oct-2005
Document revision history
Revision 1 2 Initial release. PPAP references inserted in the datasheet. See the order codes table on the cover page. Minor changes to formatting and grammar. TS431AIYLT PPAP reference inserted. See the order codes table on the cover page. Included footnote on automotive grade qualification to order code table on cover page. Updated package information (changed mils to inches). Changes
2-Jan-2006
3
22-Sep-2006
4
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TS431
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