TL431_05 [UTC]
PROGRAMMABLE PRECISION REFERENCE; 可编程精密基准
| 型号： | TL431_05 |
| 厂家： | 
Unisonic Technologies |
| 描述： | PROGRAMMABLE PRECISION REFERENCE |
| 文件： | 总6页 (文件大小：88K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
TL431
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
1
REFERENCE
.
1
SOT-89
TO-92
ꢀ
DESCRIPTION
The UTC TL431 is a three-terminal adjustable regulator with a
guaranteed thermal stability over applicable temperature ranges.
The output voltage may be set to any value between VREF
(approximately 2.5V) and 36 V with two external resistors. It
provides very wide applications, including shunt regulator, series
regulator, switching regulator, voltage reference and others.
SOP-8
1
3
2
3
5
1
2
4
SOT-23
SOT-25
ꢀ
FEATURES
*Programmable output Voltage to 36V.
*Low dynamic output impedance 0.2Ω.
*Sink current capability of 1.0 to 100mA.
*Equivalent full-range temperature coefficient of 50ppm/ °C
typical for operation over full rated operating temperature range.
*Pb-free plating product number: TL431K
*Pb-free plating product for SOT-23NS type
number: TL431NSL
ꢀ
ORDERING INFORMATION
Order Number
Pin Assignment
Package
Packing
Normal
Lead Free Plating
TL431K-AB3-R
TL431K-AE3-R
TL431NSL-AE3-R
TL431K-AF5-R
TL431K-S08-R
TL431K-S08-T
TL431K-T92-B
TL431K-T92-K
TL431K-T92-R
1
R
K
R
X
K
K
R
R
R
2
A
R
K
X
A
A
A
A
A
3
K
A
A
K
A
A
K
K
K
4
-
5
-
6
-
7
-
8
-
TL431-AB3-R
TL431-AE3-R
TL431NS-AE3-R
TL431-AF5-R
TL431-S08-R
TL431-S08-T
TL431-T92-B
TL431-T92-K
TL431-T92-R
SOT-89
SOT-23
SOT-23
SOT-25
SOP-8
SOP-8
TO-92
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tube
-
-
-
-
-
-
-
-
-
-
R
X
X
-
A
X
X
-
-
-
-
A
A
-
A
A
-
R
R
-
Tape Box
Bulk
-
-
-
-
-
TO-92
-
-
-
-
-
TO-92
Tape Reel
Note: Pin Code: K: Cathode
A: Anode R: Reference X: No Connection
TL431K-AB3-R
(1) B: Tape Box, K: Bulk, R: Tape Reel, T: Tube
(1)Packing Type
(2)Package Type
(2) AB3: SOT-89, AE3: SOT-23, AF5: SOT-25,
S08:SOP-8, T92: TO-92
(3)Lead Plating
(3) K: Lead Free Plating, Blank: Pb/Sn
L : Lead Free Plating, Only for SOT-23NS Type
ꢀ
MARKING (SOT-23/SOT-25)
431N
431
Lead Plating
Lead Plating
For TL431
For TL431NS
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Copyright © 2005 Unisonic Technologies Co., Ltd
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TL431
LINEAR INTEGRATED CIRCUIT
ꢀ
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE(K)
REFERENCE(R)
2.5V VREF
ANODE(A)
ANODE
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LINEAR INTEGRATED CIRCUIT
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ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
SYMBOL
VKA
RATINGS
37
UNIT
V
Cathode Voltage
Cathode Current Range(Continuous)
Reference Input Current Range
IKA
-100 ~ +150
-0.05 ~ +10
770
mA
mA
mW
mW
mW
IREF
TO-92
Power Dissipation
PD
SOT-89
800
SOT-23/SOT-25
300
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature
TJ
+150
°
°
°
C
C
C
TOPR
TSTG
-40 ~ +85
-65 ~ +150
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ꢀ
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
VKA
MIN TYP MAX UNIT
Cathode Voltage
Cathode Current
VREF
1
36
V
IKA
100
mA
ꢀ ELECTRICAL CHARACTERISTICS (TC= 25
℃
, unless otherwise specified.)
PARAMETER
Reference Input Voltage
SYMBOL
VREF
TEST CONDITIONS MIN TYP MAX UNIT
VKA=VREF,IKA=10mA
KA=VREF,IKA=10mA
Ta 70
2.470 2.495 2.520
V
Deviation of reference Input Voltage Over
temperature
V
∆
VREF
/
∆
T
4.5
17
mV
0°
C
≦
≦
°C
Ratio of Change in Reference Input
Voltage to the Change in Cathode Voltage
Reference Input Current
∆
∆
VKA=10V~VREF
VKA=36V~10V
-1.0
-0.5
1.5
-2.7
-2.0
4
∆
VREF
/
∆
VKA IKA=10mA
mV/V
IREF
IREF
IKA=10mA, R1=10k
Ω, R2=
, R2=
∞
∞
µ
µ
A
A
Deviation of Reference Input Current Over
Full Temperature Range
IKA=10mA, R1=10k
Ta =full Temperature
Ω
∆
/
∆
T
0.4
1.2
Minimum Cathode Current for Regulation
Off-State Cathode Current
IKA(MIN) VKA=VREF
0.45
0.05
1.0
1.0
mA
IKA(OFF) VKA=36V, VREF=0
µA
V
KA=VREF, IKA=1 to 100mA
Dynamic Impedance
ZKA
0.15
0.5
Ω
f
≤1.0kHz
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TL431
LINEAR INTEGRATED CIRCUIT
■ TYPICAL CHARACTERISTICS
Cathode Current vs. Cathode Voltage
125
Cathode Current vs . Cathode Voltage
800
Ta=25°C
100
Ta=25°C
VKA=VREF
600
V
KA=VREF
75
50
25
0
400
IKA(MIN)
200
0
-25
-50
-75
-100
-200
-2
-1
0
1
2
3
-2
-1
0
1
2
3
Cathode Voltage (V)
Cathode Voltage (V)
Change in Reference Input Voltage vs .
Cathode Voltage
Pulse Response
Ta=25°C
0
-5
7
IKA=100mA
Ta=25°C
-10
-15
-20
-25
-30
-35
-40
6
5
4
3
2
1
0
0
5
10
15
20
25
30
35
40
0
1
2
3
4
5
6
7
Cathode Voltage(V)
Time (
μs)
Dynamic Impedance vs. Frequency
Small Signal Voltage Amplification vs. Frequency
Ta=25°C
70
102
60
50
40
30
Ta=25°C
KA=0mA to 100mA
IKA=10mA
I
101
20
10
0
100
-1
10
-10
103
104
105
Frequency (Hz)
106
107
103
104
105
106
107
Frequency (Hz)
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TL431
LINEAR INTEGRATED CIRCUIT
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TYPICAL CHARACTERISTICS (Cont.)
2.52
2.51
2.5
2.49
2.48
2.47
2.46
2.45
C
C
C
C
C
C
C
°
C
°
°
°
°
°
°
°
0
0
0
0
0
0
0
0
8
4
2
-
2
4
6
0
-
1
Temperature
140
A
B
A VKA=Vref
B VKA=5.0V@I
120
100
80
K
=10mA
C VKA=10V@I
D VKA=15V@I
Ta=25℃
K
=10mA
=10mA
K
C
unstable
60
40
stable
stable
D
20
0
100p
10n
1n
100n
1μ
10μ
Load Capacitance, C
L
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TL431
LINEAR INTEGRATED CIRCUIT
ꢀ
TEST CIRCUIT
VKA
V
KA
INPUT
INPUT
R1
V
KA
INPUT
I
KA
I
KA
IKA(OFF)
I
REF
UTC TL431
UTC TL431
UTC TL431
VREF
R2
V
REF
V
KA=VREF*(1+R1/R2)+IREF*R1
For VKA=VREF
For VKA
≧
VREF
For IKA(OFF)
ꢀ
APPLICATION CIRCUIT
V
IN
V
IN
VoUT
VoUT
V
IN
IN
VoUT
OUT
UTC7805
COMMON
R1
R1
R1
V
REF
V
REF
VREF
R2
R2
R2
UTC TL431
UTC TL431
UTC TL431
Vo=(1+R1/R2)*VREF
Vo=(1+R1/R2)*VREF
Vo=(1+R1/R2)*VREF
Shutdown Regulator
Output Control of a Three
-Terminal Fixed Regulator
Higher-current Shunt Regulator
Io
VoUT
VIN
VIN
VoUT
Io
R
CL
Rs
Rs
UTC TL431
IO=VREF/RS
RS=VREF/RCL
UTC TL431
Constant-current Sink
Current Limiting or Current Source
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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