TL431ACZ [STMICROELECTRONICS]
PROGRAMMABLE VOLTAGE REFERENCE; 可编程电压参考
| 型号： | TL431ACZ |
| 厂家： | 
ST |
| 描述： | PROGRAMMABLE VOLTAGE REFERENCE |
| 文件： | 总10页 (文件大小：153K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TL431
PROGRAMMABLE VOLTAGE REFERENCE
■ ADJUSTABLE OUTPUT VOLTAGE :
2.5 to 36V
■ SINK CURRENT CAPABILITY : 1 to 100mA
■ TYPICAL OUTPUT IMPEDANCE : 0.22Ω
■ 1% AND 2% VOLTAGE PRECISION
DESCRIPTION
Z
The TL431 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.
The TL431 operates with a wide current range
from 1 to 100mA with a typical dynamic
impedance of 0.22Ω.
TO92
(Plastic Package)
ORDER CODE
Package
D
SO8
(Batwing Plastic Micropackage)
Part
Temperature
Range
Number
Z
D
TL431C/AC
0°C, +70°C
•
•
•
•
TL431I/AI
-40°C, +105°C
Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT)
and Ammo Pack (AP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
SO8
(Top view)
TO92
(Top view)
Cathode Anode Reference
8
7
6
5
1- Cathode
2- Anode
3- Anode.
4- N.C.
1
2
3
5- N.C.
6- Anode
7- Anode.
8- Reference
1
2
3
4
1/10
March 2002
TL431
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VKA
Cathode to Anode Voltage
37
V
I
Continuous Cathode Current Range
Reference Input Current Range
-100 to +150
-0.05 to +10
mA
mA
k
Iref
1)
625
960
Power Dissipation
TO92
SO8 batwing
p
mW
d
T
Storage Temperature Range
-65 to +150
°C
stg
1. Pd is calculated with T
= +25°C, T = +150°C and R
thja
= 200°C/W for TO92 package
= 130°C/W for SO8 batwing package
amb
j
OPERATING CONDITIONS
Symbol
Parameter
Value
Unit
VKA
V
ref to 36
Cathode to Anode Voltage
V
I
Cathode Current
1 to 100
mA
k
T
Operating Free-air Temperature Range TL431C/AC
TL431I/AI
0 to +70
-40 to +105
oper
°C
ELECTRICAL CHARACTERISTICS
Tamb = 25°C (unless otherwise specified)
TL431C
Typ.
TL431AC
Typ.
Symbol
Parameter
Unit
Min.
Max.
Min.
Max.
Reference Input Voltage
VKA = Vref , Ik = 10 mA
Tamb = 25°C
Tmin ≤Tamb ≤ Tmax
Reference Input Voltage Deviation Over-
V
2.44
2.423
2.495
2.55
2.567 2.453
2.47
2.495
2.52
2.537
V
ref
∆Vref Temperature Range - note 1
VKA = Vref, Ik = 10 mA,Tmin ≤Tamb ≤ Tmax
3
17
3
15
mV
mV/V
µA
Ratio of Change in Reference Input
Voltage to Change in Cathode to Anode
∆Vref
∆Vka
Voltage - (figure 2)
Ik = 10mA
------------
∆VKA = 10V to Vref
∆VKA = 36V to 10V
-1.4
-1
-2.7
-2
-1.4
-1
-2.7
-2
Reference Input Current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Iref
Tamb = 25°C
Tmin ≤Tamb ≤Tmax
Reference Input Current Deviation
1.8
4
5.2
1.8
4
5.2
Over Temperature Range
Ik = 10mA, R1 = 10kΩ, R2 =∞
∆Iref
Tmin ≤Tamb ≤ Tmax
0.4
1.2
0.4
1.2
µA
Minimum Cathode Current for Regulation
VKA = Vref
Imin
Ioff
0.5
2.6
1
0.5
2.6
0.6
1000
mA
nA
Off-State Cathode Current
1000
Dynamic Impedance - note 2
VKA = Vref ,∆ Ik = 1 to100mA, f ≤1kHZ
ZKA
0.22
0.5
0.22
0.5
Ω
1) ∆V is defined as the difference between the maximum and minimum values obtained over the full temperature range.
ref
∆V = V
ref ref max.
- V
ref min.
Vref max.
V ref min.
Temperature
T1
T2
∆VKA
∆IK
----------------
=
2) The dynamic Impedance is definied as ZKA
2/10
TL431
ELECTRICAL CHARACTERISTICS
amb = 25°C (unless otherwise specified)
T
TL431I
Typ.
TL431AI
Typ.
Symbol
Parameter
Unit
Min.
Max.
Min.
Max.
Reference Input Voltage
V
KA = Vref , Ik = 10 mA Tamb = 25°C
V
2.44
2.41
2.495
2.55
2.58
2.47
2.44
2.495
2.52
2.55
V
ref
Tmin ≤Tamb ≤ Tmax
Reference Input Voltage Deviation Over-
∆Vref Temperature Range - note 1
VKA = Vref , Ik =10 mA,Tmin≤Tamb≤ Tmax
7
30
7
30
mV
mV/V
µA
Ratio of Change in Reference Input
Voltage to Change in Cathode to Anode
Voltage
∆Vref
------------
∆Vka
Ik = 10mA
∆VKA = 10V to Vref
∆VKA = 36V to 10V
-1.4
-1
-2.7
-2
-1.4
-1
-2.7
-2
Reference Input Current
Ik = 10mA, R1 = 10kΩ, R2 = ∞
Iref
Tamb = 25°C
Tmin ≤Tamb ≤Tmax
Reference Input Current Deviation
1.8
4
6.5
1.8
4
6.5
Over Temperature Range
Ik = 10mA, R1 = 10kΩ, R2 =∞
∆Iref
Tmin ≤Tamb ≤ Tmax
0.8
2.5
0.8
1.2
µA
Minimum Cathode Current for Regulation
VKA = Vref
Imin
Ioff
0.5
2.6
1
0.5
2.6
0.7
mA
nA
Off-State Cathode Current
1000
1000
Dynamic Impedance note 2
VKA = Vref ,∆ Ik = 1 to100mA, f ≤1kHZ
ZKA
0.22
0.5
0.22
0.5
Ω
1) ∆V is defined as the difference between the maximum and minimum values obtained over the full temperature range.
ref
∆V = V
ref ref max.
- V
ref min.
Vref max.
V ref min.
Temperature
T1
T2
∆VKA
∆IK
----------------
=
2) The dynamic Impedance is definied as ZKA
3/10
TL431
Figure 1 : Test Circuit for V = V
Figure 2 : Test Circuit for V > V
REF
KA
REF
KA
Input
R
Output
IK
Input
R
Output
R1
IREF
IK=10mA
VKA
VKA
R2
VREF
VREF
R1
V
= V
(1 + ------- ) + R1 x I
R2
KA
REF
REF
Figure 4 : Test Circuit for Phase Margin and
Figure 3 : Test Circuit for I
OFF
Voltage Gain
VKA=36V
10µF
IK=10mA
IOFF
10µF
Input
VREF
Figure 6 : Test Circuit for Response time
Figure 5 : Block diagram of TL1431
Cathode
IK=1mA
Vref
+
-
1 mA
0 mA
Vref
Anode
4/10
TL431
Reference voltage vs Temperature
Reference voltage vs cathode current
100
2.54
75
50
25
0
TAMB=+25°C
VKA = VREF
IK = 10 mA
2.52
2.50
2.48
2.46
2.44
-25
-50
-40
-20
0
20
40
60
80
100
-1
0
1
2
3
Temperature (
°C)
Cathode voltage VKA (V)
Reference voltage vs cathode current
Reference current vs temperature
2
2.0
IK=10 mA
TAMB = +25
°
C
R1=10k
R2= +
Ω
1
0
1.5
1.0
0.5
0.0
-1
-2
-1
0
1
Cathode voltage VKA (V)
2
3
−40
−20
0
20
40
60
80
100
Temperature °C
Off-state cathode current vs temperature
Ratio of change in V
Temperature
to change in V vs
REF
KA
2.0
0.0
-0.5
-1.0
-1.5
-2.0
VKA = 36 V
VREF = 0 V
1.5
1.0
0.5
0.0
IK = 10 mA
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (
°C)
Temperature (°C)
5/10
TL431
Static impedance R vs Temperature
Minimum operating current vs temperature
KA
0.6
0.30
0.28
0.4
VKA=VREF
0.26
TAMB=+25°C
0.24
0.22
0.20
VKA = VREF
0.2
0.0
-40
-20
0
20
40
60
80
100
-40
-20
0
20
40
60
80
100
Temperature (°C)
Temperature (
°C)
Gain & Phase vs Frequency
Stability behaviour with capacitive loads
100
60
200
VKA=VREF
IK=10 mA
Gain
150
100
50
80
See figure 4
40
VKA=5 V
Instable
Area
60
Phase
20
0
0
VKA=12 V
40
-50
-100
-150
-200
VKA=24 V
20
-20
-40
0
1E-10
1E-9
1E-8
1E-7
1E-6
1E-5
1
10
100
1000
10000
Capacitive load (Farad)
Frequency (kHz)
Maximum Power dissipation
Pulse response for I =1mA
K
6
100
Input
TAMB= +25°C
SO8
Batwing
80
VKA=VREF
4
2
0
TAMB=+25°C
60
TO92
Output
40
Safe
Area
20
0
10
20
30
0
2
4
6
8
10
Cathode voltage (V)
Time (µs)
6/10
TL431
PACKAGE MECHANICAL DATA
8 PINS - BATWING PLASTIC MICROPACKAGE (SO)
L
c1
b
s
E
e3
D
M
5
8
1
4
Millimeters
Typ.
Inches
Typ.
Dim.
Min.
Max.
Min.
Max.
A
a1
a2
a3
b
1.75
0.25
1.65
0.85
0.48
0.25
0.5
0.069
0.010
0.065
0.033
0.019
0.010
0.020
0.1
0.004
0.65
0.35
0.19
0.25
0.026
0.014
0.007
0.010
b1
C
c1
D
45° (typ.)
4.8
5.8
5.0
6.2
0.189
0.228
0.197
0.244
E
e
1.27
3.81
0.050
0.150
e3
F
3.8
0.4
4.0
1.27
0.6
0.150
0.016
0.157
0.050
0.024
L
M
S
8° (max.)
7/10
TL431
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (TAPE & REEL)
A1
P
T
P
H
d
D0
F1
F2
P2
P0
Millimeters
Typ.
Inches
Typ.
Dim.
Min
Max.
Min.
Max.
AL
A
5.0
5.0
4.0
0.197
0.197
0.157
T
d
0.45
0.018
I1
2.5
11.7
12.4
5.95
2.4
0.098
0.461
0.488
0.234
0.094
-0.039
-0.039
0.689
0.224
0.335
P
12.7
12.7
6.35
2.5
0
13.7
13
0.500
0.500
0.250
0.098
0
0.539
0.512
0.266
0.110
0.039
0.039
0.748
0.248
0.384
0.020
0.787
0.650
0.984
0.165
0.433
PO
P2
F1/F2
∆h
∆P
W
6.75
2.8
1
-1
-1
0
1
0
17.5
5.7
18.0
6
19.0
6.3
9.75
0.5
20
0.709
0.236
0.354
W0
W1
W2
H
8.5
9
H0
H1
DO
L1
15.5
3.8
16
16.5
25
0.610
0.150
0.630
0.157
4.0
4.2
11
8/10
TL431
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (TAPE AMMO PACK)
A1
P
T
P
H
d
D0
F1
F2
P2
P0
Millimeters
Typ.
Inches
Typ.
Dim.
Min
Max.
Min.
Max.
AL
A
5.0
5.0
4.0
0.197
0.197
0.157
T
d
0.45
0.018
I1
2.5
11.7
12.4
5.95
2.4
0.098
0.461
0.488
0.234
0.094
-0.039
-0.039
0.689
0.224
0.335
P
12.7
12.7
6.35
2.5
0
13.7
13
0.500
0.500
0.250
0.098
0
0.539
0.512
0.266
0.110
0.039
0.039
0.748
0.248
0.384
0.020
0.787
0.650
0.984
0.165
0.433
PO
P2
F1/F2
∆h
∆P
W
6.75
2.8
1
-1
-1
0
1
0
17.5
5.7
18.0
6
19.0
6.3
9.75
0.5
20
0.709
0.236
0.354
W0
W1
W2
H
8.5
9
H0
H1
DO
L1
15.5
3.8
16
16.5
25
0.610
0.150
0.630
0.157
4.0
4.2
11
9/10
TL431
PACKAGE MECHANICAL DATA
3 PINS - PLASTIC PACKAGE TO92 (BULK)
Millimeters
Dim.
Inches
Typ.
Min
Typ.
Max.
Min.
Max.
L
B
1.27
3.7
0.05
3.2
4.45
4.58
12.7
0.407
0.35
4.2
5.2
0.126
0.1752
0.1803
0.5
0.1457
0.1969
0.198
0.1654
0.2047
0.2098
O1
C
5.00
5.03
5.33
K
O2
a
0.5
0.508
0.016
0.0138
0.0197
0.02
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.
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