STMICROELECTRONICS TS431IZ

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