STMICROELECTRONICS TL1431AIZ

TL1431
Programmable Voltage Reference
■
Adjustable output voltage: VREF to 36V
■
Sink current capability: 1 to 100mA
■
Typical output impedance: 0.22Ω
■
0.4% and 0.25% voltage precision
Z
TO92
(Plastic Package)
Description
The TL1431 is a programmable shunt voltage
reference with guaranteed temperature stability
over the entire temperature range of operation.
The output voltage may be set to any value
between 2.5V and 36V with two external resistors.
D
SO-8
(Batwing Plastic Micropackage)
The TL1431 operates with a wide current range
from 1 to 100mA with a typical dynamic
impedance of 0.2Ω.
Order Codes
Part Number
Temperature
Range
Package
Packing
TL1431CD/CDT
Marking
1431C
SO-8
TL1431ACD/ACDT
TL1431CZ/CZT/CZ-AP
1431AC
-20, +70°C
TL1431C
TO92
TL1431ACZ/ACZT/ACZAP
TL1431AC
Tube or Tape & Reel
TL1431ID/IDT
1431I
SO-8
TL1431AID/AIDT
TL1431IZ/IZT/IZ-AP
1431AI
TL1431I
-40, + 105°C
TO92
TL1431AIZ/AIZT/AIZ-AP
TL1431IYD/IYDT
November 2005
TL1431AI
SO-8 (automotive grade level)
1431IY
Rev 2
1/13
www.st.com
13
Pin Diagrams
1
TL1431
Pin Diagrams
Figure 1.
TO92 pin connections (top view)
Cathode Anode Reference
1
Figure 2.
2
3
SO-8 pin connections (top view)
8
7
6
5
1 - Cathode
2 - Anode
3 - Anode
4 - N.C.
5 - N.C.
6 - Anode
7 - Anode
8 - Reference
1
2/13
2
3
4
TL1431
2
Absolute Maximum Ratings
Absolute Maximum Ratings
Table 1.
Key parameters and their absolute maximum ratings
Symbol
VKA
Parameter
Cathode to Anode Voltage
Value
Unit
37
V
Ik
Continuous Cathode Current Range
-100 to +150
mA
Iref
Reference Input Current Range
-0.05 to +10
mA
TJ
Junction temperature
+150
°C
625
960
mW
-65 to +150
°C
Power Dissipation (1)
Pd
Tstg
TO92
SO-8 batwing
Storage Temperature Range
1. Calculated with TJ=+150°C and TAMB=+25°C with relative RTHJ-A depending on the package
Table 2.
Operating conditions
Symbol
VKA
Ik
Parameter
Value
Unit
Cathode to Anode Voltage
Vref to 36
V
Cathode Current
1 to 100
mA
-200 to +70
-40 to +105
°C
130
200
°C/W
Operating Free-air Temperature Range
Toper
TL1431C/AC
TL1431I/AI
Thermal resistance Junction to Ambient
RTHJ-A
SO 8 Batwing
TO92
3/13
Electrical Characteristics
3
TL1431
Electrical Characteristics
Table 3.
Tamb = 25°C (unless otherwise specified)
TL1431C
Symbol
Unit
Min.
Vref
∆Vref
∆Vref
---------------∆Vka
Iref
Typ.
Imin
Ioff
⏐ZKA⏐
Min.
Typ.
Max.
V
2.490 2.500 2.510 2.493 2.500 2.507
VKA = Vref , Ik = 10 mA
Reference Input Voltage Deviation Over
Temperature Range (1) - figure 1
mV
3
20
3
20
±13
±90
±13
±90
Temperature Coefficient of Reference Input
Voltage (2)
ppm/°C
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - figure 2
mV/V
Ik = 10mA - ∆VKA = 36V to 3V
-2
Reference Input Current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
-1.1
1.5
Tmin ≤Tamb ≤Tmax
∆Iref
Max.
Reference Input Voltage - figure 1
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
∆Vref
---------------∆T
TL1431AC
Parameter
-2
2.5
3
-1.1
1.5
2.5
3
Reference Input Current Deviation Over
Temperature Range
µA
Ik = 10mA, R1 = 10kΩ, R2 =∞
Tmin ≤Tamb ≤ Tmax
0.2
1.2
0.2
1.2
0.5
1
0.5
0.6
180
500
180
500
0.2
0.5
0.2
0.5
Minimum Cathode Current for Regulation - figure 1
VKA = Vref
Off-State Cathode Current - figure 3
Dynamic Impedance
VKA = Vref , ∆ Ik = 1 to100mA, f ≤1kHZ
V ref max.
V ref min.
Temperature
T2
T1
The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within
which the reference is guaranteed.
-n
Max
2.5V
min
ppm
/°C
C
pm/°
+n p
Temperature
25°C
3. The dynamic Impedance is definied as |ZKA| =
4/13
mA
nA
(3)
1. ∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature range.
∆Vref = Vref max. - Vref min.
2.
µA
∆VKA
----------------∆IK
Ω
TL1431
Table 4.
Electrical Characteristics
Tamb = 25°C (unless otherwise specified)
TL1431I
Symbol
Unit
Min.
Vref
TL1431AI
Parameter
Typ.
Max.
Min.
Typ.
Max.
Reference Input Voltage - figure 1
V
2.490 2.500 2.510 2.493 2.500 2.507
VKA = Vref , Ik = 10 mA
Reference Input Voltage Deviation Over
∆Vref
Temperature Range (1) - figure 1
mV
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
∆Vref
---------------∆T
∆Vref
---------------∆Vka
Iref
7
30
7
30
±22
±100
±22
±100
-1.1
2
-1.1
2
1.5
2.5
3
1.5
2.5
3
Temperature Coefficient of Reference Input
Voltage (2)
ppm/°C
VKA = Vref, Ik = 10 mA, Tmin ≤Tamb ≤ Tmax
Ratio of Change in Reference Input Voltage to
Change in Cathode to Anode Voltage - figure 2
mV/V
Ik = 10mA - ∆VKA = 36V to 3V
Reference Input Current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Tmin ≤Tamb ≤Tmax
∆Iref
Imin
Ioff
⏐ZKA⏐
Reference Input Current Deviation Over
Temperature Range
µA
Ik = 10mA, R1 = 10kΩ, R2 =∞
Tmin ≤Tamb ≤ Tmax
0.5
1
0.8
1.2
0.5
1
0.5
0.7
180
500
180
500
0.2
0.5
0.2
0.5
Minimum Cathode Current for Regulation - figure 1
VKA = Vref
Off-State Cathode Current - figure 3
Dynamic Impedance
µA
mA
nA
(3)
VKA = Vref , ∆ Ik = 1 to100mA, f ≤1kHZ
Ω
1. ∆Vref is defined as the difference between the maximum and minimum values obtained over the full temperature range.
∆Vref = Vref max. - Vref min.
V ref max.
V ref min.
2.
Temperature
T2
T1
The temperature coefficient is defined as the slopes (positive and negative) of the voltage vs temperature limits within
which the reference is guaranteed.
-n
Max
2.5V
min
ppm
/°C
C
pm/°
+n p
Temperature
25°C
3. The dynamic Impedance is definied as|ZKA| =
∆VKA
----------------∆IK
5/13
Electrical Characteristics
Figure 3.
TL1431
Test circuit for VKA = VREF
Figure 4.
Test circuit for V KA = VREF
Input
Input
R
Output
R
Output
IK
R1
IK=10mA
VKA
IREF
R2
VKA
VREF
VREF
R1
VKA = VREF ( 1 + -------- ) + R1 x IREF
R2
Figure 5.
Test circuit for IOFF
Figure 6.
Test circuit for phase margin and
voltage gain
VKA=36V
10µF
10µF
Figure 7.
Block diagram of TL1431
Figure 8.
Output
8.25kΩ
Input
IK=10mA
15kΩ
IOFF
VREF
Test circuit for response time
Cathode
Vref
Anode
6/13
IK=1mA
+
1 mA
0 mA
Output
Vref
TL1431
Figure 9.
Electrical Characteristics
Reference voltage vs. temp.
Figure 10. Reference voltage vs. cathode current
3
2.498
Reference voltage (V)
Reference voltage (V)
2.500
2.496
2.494
2.492
IK=10 mA
VKA=VREF=2.5 V
See figure 1
2.490
2.488
2.486
-40
2
VKA=VREF
See figure 1
1
0
-1
-20
0
20
40
60
80
100
120
-40
-20
0
Temperature (°C)
20
40
60
80
100
Cathode current (mA)
Figure 11. Reference voltage vs. cathode current Figure 12. Reference current vs. temp.
2.0
2.5
1.5
2.0
IREF (µA)
Reference voltage (V)
3.0
VKA=VREF
See figure 1
1.5
1.0
1.0
IK=10 mA
VKA=VREF
See figure 1
0.5
0.5
0.0
0.0
0.2
0.4
0.6
0.8
0.0
-40
1.0
-20
0
Cathode current (mA)
60
80
100
120
Figure 14. Ratio of change in VREF to change in
VKA vs. temp.
0.10
0.0
∆VREF / ∆VKA (mV / V)
VKA = 36V
See figure 3
0.08
IOFF (µA)
40
Temperature (°C)
Figure 13. Off-state cathode current vs. temp.
0.06
0.04
IK=10 mA
VKA=VREF
See figure 2
-0.5
-1.0
-1.5
0.02
0.00
-40
20
-20
0
20
40
60
Temperature(°C)
80
100
120
-2.0
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
7/13
Electrical Characteristics
TL1431
Figure 15. Drfit of RKA vs. temp.
Figure 16. Maximum operating current vs. temp.
0.52
0.00
0.48
IMIN (mA)
∆ RKA ( Ω)
0.50
IK=10 mA
VKA=VREF= 2.5V
see figure 1
-0.01
-0.02
IK=IMIN
VKA=VREF
See figure 1
0.46
0.44
-0.03
0.42
-0.04
-40
-20
0
20
40
60
80
100
0.40
-40
120
-20
0
20
Figure 17. Gain & phase vs. frequency
0
-50
Phase (°)
Gain (dB)
50
Phase
0
VKA=5V
60
Stable
Area
10
100
VKA=12V
40
VKA=24V
-200
10000
1000
Stable
Area
Instable
Area
20
-150
1
120
80
-100
-20
-40
100
VKA=VREF
150
100
20
80
100
Cathode current (mA)
IK=10 mA
See figure 4
40
60
Figure 18. Stability behaviour with capacitive
loads
200
60
Gain
40
Temperature (°C)
Temperature (°C)
0
1E-10
Frequency (kHz)
1E-9
1E-8
1E-7
1E-6
1E-5
Capacitive Load (F)
Figure 19. Maximum power dissipation
Figure 20. Pulse response for I K = 1mA
6
100
Current step: 1 mA
80
Voltage (V)
Cathode current (mA)
TAMB= +25°C
SO8
Batwing
60
TO92
40
20
0
TAMB=+25°C
See figure 6
Output voltage
2
Safe
Area
10
4
20
Cathode voltage (V)
30
0
0
1
2
3
Time (µs)
8/13
4
5
TL1431
4
Package Mechanical Data
Package Mechanical Data
In order to meet environmental requirements, ST 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 ST trademark. ECOPACK specifications are available at:
www.st.com.
4.1
SO-8 Batwing Package
SO-8 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
inch
MAX.
MIN.
TYP.
0.053
0.069
MAX.
A
1.35
1.75
A1
0.10
0.25
0.04
0.010
A2
1.10
1.65
0.043
0.065
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
E
3.80
4.00
0.150
0.157
e
1.27
0.050
H
5.80
6.20
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
ddd
8˚ (max.)
0.1
0.04
0016023/C
9/13
Package Mechanical Data
4.2
TL1431
TO92 (Tape & Reel) Package
TO-92 MECHANICA DATA
mm.
mils
DIM.
MIN.
TYP
MAX.
MIN.
TYP.
MAX.
A
4.32
4.95
170.1
194.9
b
0.36
0.51
14.2
20.1
D
4.45
4.95
175.2
194.9
E
3.30
3.94
129.9
155.1
e
2.41
2.67
94.9
105.1
e1
1.14
1.40
44.9
55.1
L
12.7
15.49
500.0
609.8
R
2.16
2.41
85.0
94.9
S1
0.92
1.52
36.2
59.8
W
0.41
0.56
16.1
22.0
0102782/C
10/13
TL1431
TO92 (Tape Ammo Pack) Package
A1
P
T
P
A
H
W2
W0
W
L1
W1
H
I1
H0
d
H1
4.3
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
∆h
-1
0
1
-0.039
0
0.039
∆P
-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
11/13
Package Mechanical Data
4.4
TL1431
TO92 (Bulk) Package
Millimeters
Inches
Dim.
Min
L
12/13
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
TL1431
5
Revision History
Revision History
Date
Revision
Changes
March 2002
1
Initial release.
Nov. 2005
2
PPAP references inserted in the datasheet see Table : Order Codes on
page 1 .
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2005 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
13/13