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 TO92 (Plastic package)
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. When driving an optocoupler, the TS431 is particularly useful for regulating 3.3V switching power supplies. L SOT23-5 (Plastic micropackage)
August 2007
Rev 6
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Absolute maximum ratings and operating conditions
TS431
1
Absolute maximum ratings and operating conditions
Table 1.
Symbol VKA Ik Iref Pd Tstg
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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TS431
Electrical characteristics
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
A A
1. Limits are 100% production tested at 25C. Behavior at the temperature range limits is guaranteed through correlation and by design. 2. See definition below.
Definition of output voltage change over temperature range
Vref is defined as the difference between the maximum and minimum values obtained over the full temperature range. Vref = Vref max - Vref min Figure 1. Output voltage change over temperature range
V ref m ax .
V r e f m in .
T1
T2
T e m p e r a tu r e
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Electrical characteristics
TS431
Figure 2.
1 .2 5 2
Reference voltage vs. temperature
Figure 3.
Input
Test circuit for VKA = Vref
Output Ik
1 .2 4 8 Reference voltage (V)
Vka = Vref Ik = 100 A
1 .2 4 4
1.2 4
Vka
1 .2 3 6
1 .2 3 2 1 .2 2 8 -4 0 -20 0 20 40 60 80 1 00 120 Temperature (C)
Vref
Figure 4.
15
Cathode voltage vs. cathode current
Figure 5.
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 6.
100
Reference input current vs. temperature
Figure 7.
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 -2 0 0 20 40 60 80 100 120 Temperature (C)
0 -40 -2 0 0 20 40 60 80 100 120 Temperature (C)
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TS431
Electrical characteristics
Figure 8.
2 00
Off-state current vs. temperature
Figure 9.
Test circuit for off-state current measurement
Vka=6V Ioff
Input
IOff Off-State current (nA) 1 50
1 00
50
0 -40 -20 0 20 40 60 80 100 120 Temperature (C)
Figure 10. Ratio of change in reference input voltage to change in VKA voltage vs. temperature
Ratio of change in reference input voltage (mV/V) 0
Figure 11. Test circuit for VKA > Vref
Input
Vka
Ik
-1
R1 Iref
Ik = 10mA Vka = 6V to Vref
-2
R2
Vref
-3 -4 0 - 20 0 20 40 60 80 1 00 120 Temperature (C)
Vka = Vref . (1+R1/R2) + Iref . R1
Figure 12. Phase and gain vs. frequency
60 150
Figure 13. 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
G a in
10 0 1E+3
Input
-100 -150 1 E +6
4.3K
Vref
1E+4
1E+5
Frequency (Hz)
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Electrical characteristics Figure 14. Pulse response at Ik=100A
TS431
Figure 15. 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 16. Pulse response at Ik=1mA
Figure 17. Test circuit for pulse response at Ik=1mA
Input voltage
3 input and output voltage (V)
1.8K Ik=1mA
2
Output voltage
1
0 0 1 2 3 4 5 6 7 Time (s)
Figure 18. Equivalent input noise vs. frequency
2 50
Equivalent input noise (nv/VHz)
2 00
1 50
1 00
Vka = Vref Ik = 100 A T=25C
50
0 0.1 1 10 Frequency (KHz) 1 00 1 00 0
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Intput
50
Output
Pulse Generator f=100KHz
Output
Pulse Generator f=100KHz
Intput
TS431
Package information
3
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK 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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Package information
TS431
3.1
SOT23-5 package mechanical data
Dimensions Ref. Min. A A1 A2 b C D H E 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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TS431
Package information
3.2
TO92 (tape ammo pack and tape & reel) package data
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 information
TS431
3.3
TO92 (bulk) package mechanical data
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
Ordering information
4
Table 4.
Ordering information
Order codes
Temperature range Package Packing Marking L272 SOT23-5 Tape & reel L274 -40C, + 125C SOT23-5 (automotive grade level) L276 L273 Bulk (Z), Tape & reel (ZT) or Ammo pack (AP) TS431I TS431AI TS431BI L271 L270
Part number TS431ILT TS431AILT TS431BILT TS431IYLT(1) TS431AIYLT(1) TS431BIYLT
(1)
TS431IZ/IZT/IZ-AP TS431AIZ/AIZT/AIZ-AP TS431BIZ/BIZT/BIZ-AP TO92
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 & Q 002 or equivalent are on-going.
5
Table 5.
Date
Revision history
Document revision history
Revision 1 2 3 4 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 4: Order codes, and re-ordered order codes. Changes
1-Sep-2003 1-Oct-2005 2-Jan-2006 22-Sep-2006
25-Apr-2007
5
30-Aug-2007
6
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TS431
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