UTCTL431A [UTC]
LINEAR INTEGRATED CIRCUIT PROGRAMMABLE PRECISION REFERENCE; 线性集成电路可编程精密基准型号: | UTCTL431A |
厂家: | Unisonic Technologies |
描述: | LINEAR INTEGRATED CIRCUIT PROGRAMMABLE PRECISION REFERENCE |
文件: | 总5页 (文件大小:159K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UTC TL431A LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
1
DESCRIPTION
1
The UTC TL431A is a three-terminal adjustable regulator
SOT-89
2
TO-92
with
a
guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any
value between Vref(approximately 2.5V) and 36V with two
external resistors. It provides very wide applications,
including shunt regulator, series regulator, switching
regulator, voltage reference and others.
1
FEATURES
3
*Programmable output Voltage to 36V.
*Low dynamic output impedance 0.2Ω.
SOT-23
SOP-8
*Sink current capability of 1 to 100mA.
*Equivalent full-range temperature coefficient of 50ppm/ °C
typical for operation over full rated operating temperature
range.
SOP-8 1: Cathode
4,5: N.C.
2,3,6,7: Anode 8: Ref.
TO-92 1: Ref ; 2: Anode; 3: Cathode
SOT-89 1: Ref ; 2: Anode; 3: Cathode
SOT-23 1: Cathode; 2: Ref; 3: Anode
*Pb-free plating product number: TL431AK
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE
(K)
REFERENCE
(R)
ANODE(A)
2.5V Vref
ANODE
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-007,D
UTC TL431A LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified))
PARAMETER
Cathode Voltage
SYMBOL
VKA
VALUE
37
UNIT
V
Cathode Current Range(Continuous)
Reference Input Current Range
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature Temperature
IKA
Iref
Tj
Topr
Tstg
-100 ~ +150
-0.05 ~ +10
150
-40 ~ +85
-65 ~ +150
mA
mA
°C
°C
°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Cathode Voltage
Cathode Current
SYMBOL
VKA
MIN
VREF
1
TYP
MAX
UNIT
36
V
IKA
100
mA
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
Vref
TEST CONDITIONS
MIN TYP MAX UNIT
Reference Input Voltage
VKA=VREF,IKA=10mA
2.483 2.495 2.507
V
Deviation of reference Input Voltage ∆Vref/∆T
Over temperature(note 1)
VKA=VREF,IKA=10mA
TMIN<=TA<=TMAX
4.5
17
mV
Ratio of Change in Reference Input
∆VKA=10V~VREF
∆VKA=36V~10V
-1.0
-0.5
-2.7 mV/V
-2.0
Voltage to the Change in Cathode
Voltage
∆Vref /∆VKA IKA=10mA
Reference Input Current
Deviation of Reference Input Current ∆Iref/∆T
Over Full Temperature Range
Minimum Cathode Current for
Regulation
Iref
IKA=10mA,R1=10kΩ, R2=∞
IKA=10mA,R1=10kΩ, R2=∞
TA=full Temperature
VKA=VREF
1.5
0.4
4
1.2
µA
µA
IKA(min)
0.45
1.0
mA
Off-State Cathode Current
Dynamic Impedance
IKA(OFF)
ZKA
VKA=36V,VREF=0
VKA=VREF, IKA=1 to 100mA
f≤1.0kHz
0.05
0.15
1.0
0.5
µA
Ω
Note:TMIN=0°C,TMAX=+70°C
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-007,D
UTC TL431A LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
Fig 2 Cathode Current Vs Cathode Voltage
Fig 1 Cathode Current Vs Cathode Voltage
800
Ta=25℃
Ta=25℃
125
100
75
VKA=VREF
VKA=VREF
600
50
400
IKA(min)
25
0
200
0
-25
-50
-75
-100
-2
-200
-1
0
1
2
3
-2
-1
0
1
2
3
Cathode Voltage (V)
Cathode Voltage (V)
Fig 3 Change in Reference Input Voltage
Vs Cathode voltage
Fig 4 Pulse Response
0
Ta=25℃
-5
7
IKA=100mA
Ta=25℃
-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 (µ s)
Fig 5 Dynamic Impedance
Vs Frequency
Fig 6 Small Signal Voltage Amplification Vs Frequency
70
102
101
60
Ta=25℃
IKA=10mA
Ta=25℃
IKA=0mA to 100mA
50
40
30
20
10
0
100
10-1
-10
103
104
105
106
107
103
104
105
106
107
Frequency (Hz)
Frequency (Hz)
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R103-007,D
UTC TL431A LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
VKA
V
KA
INPUT
INPUT
R1
VKA
INPUT
I
KA
I
KA
I
KA(OFF)
I
REF
UTC TL431A
UTC TL431A
UTC TL431A
VREF
R2
VREF
VKA=VREF*(1+R1/R2)+IREF*R1
Fig 7 Test Circuit For VKA=VREF
Fig 8 Test Circuit for VKA >= VREF
Fig 9 Test Circuit For IKA(OFF)
APPLICATION CIRCUIT
Vi
Vo
Vi
Vo
IN
Vo
OUT
Vi
UTC7805
COMMON
R1
R1
R1
V
REF
V
REF
V
REF
R2
R2
R2
UTC TL431A
UTC TL431A
UTC TL431A
Vo=(1+R1/R2)*VREF
Vo=(1+R1/R2)*VREF
Vo=(1+R1/R2)*VREF
Fig 10 Shutdown Regulator
Fig 11 Output Control of a Three
-Terminal Fixed Regulator
Fig 12 Higher-current Shunt Regulator
Io
Vo
Vi
Vi
Io
Vo
RCL
Rs
Rs
UTC TL431A
IO=VREF/RS
RS=VREF/RCL
UTC TL431A
Fig 13 Constant-current Sink
Fig 14 Current Limiting or Current Source
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R103-007,D
UTC TL431A LINEAR INTEGRATED CIRCUIT
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.
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R103-007,D
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