UTC-IC TL431K-AB3-R

UNISONIC TECHNOLOGIES CO., LTD
TL431
LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
1
.
1
SOT-89
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
3
3
2
FEATURES
TO-92
1
5
1
4
SOT-23
*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.
2
SOT-25
*Pb-free plating product number: TL431K
*Pb-free plating product for SOT-23NS type
number: TL431NSL
ORDERING INFORMATION
Order Number
Pin Assignment
Package
Normal
Lead Free Plating
1 2 3 4 5 6 7 8
TL431-AB3-R
TL431K-AB3-R
R A K - - - - SOT-89
TL431-AE3-R
TL431K-AE3-R
K R A - - - - SOT-23
TL431NS-AE3-R
TL431NSL-AE3-R
R K A - - - - SOT-23
TL431-AF5-R
TL431K-AF5-R
X X K R A - - SOT-25
TL431-S08-R
TL431K-S08-R
K A A X X A A R
SOP-8
TL431-S08-T
TL431K-S08-T
K A A X X A A R
SOP-8
TL431-T92-B
TL431K-T92-B
R A K - - - - TO-92
TL431-T92-K
TL431K-T92-K
R A K - - - - TO-92
TL431-T92-R
TL431K-T92-R
R A K - - - - TO-92
Note: Pin Code: K: Cathode A: Anode R: Reference X: No Connection
TL431K-AB3-R
Packing
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tape Reel
Tube
Tape Box
Bulk
Tape Reel
(1)Packing Type
(1) B: Tape Box, K: Bulk, R: Tape Reel, T: Tube
(2)Package Type
(2) AB3: SOT-89, AE3: SOT-23, AF5: SOT-25,
S 08:SOP-8, T92: TO-92
(3) K: Lead Free Plating, Blank: Pb/Sn
L : Lead Free Plating, Only for SOT-23NS Type
(3)Lead Plating
MARKING (SOT-23/SOT-25)
431
For TL431
Lead Plating
431N
Lead Plating
For TL431NS
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Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R103-003,R
TL431
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
CATHODE
REFERENCE
CATHODE (K)
REFERENCE (R)
2.5V VREF
ANODE(A)
ANODE
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QW-R103-003,R
TL431
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified)
PARAMETER
SYMBOL
VKA
IKA
IREF
RATINGS
UNIT
Cathode Voltage
37
V
Cathode Current Range(Continuous)
-100 ~ +150
mA
Reference Input Current Range
-0.05 ~ +10
mA
TO-92
770
mW
Power Dissipation
PD
SOT-89
800
mW
SOT-23/SOT-25
300
mW
Operating Junction Temperature
TJ
+150
°C
Operating Ambient Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-65 ~ +150
°C
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
IKA
Cathode Voltage
Cathode Current
MIN
VREF
1
TYP
MAX
36
100
UNIT
V
mA
ELECTRICAL CHARACTERISTICS (TC= 25℃, unless otherwise specified.)
PARAMETER
Reference Input Voltage
Deviation of reference Input Voltage Over
temperature
Ratio of Change in Reference Input
Voltage to the Change in Cathode Voltage
Reference Input Current
Deviation of Reference Input Current Over
Full Temperature Range
Minimum Cathode Current for Regulation
Off-State Cathode Current
Dynamic Impedance
SYMBOL
TEST CONDITIONS
VREF
VKA=VREF,IKA=10mA
VKA=VREF,IKA=10mA
∆VREF/∆T
0°C≦Ta≦70°C
∆VKA=10V~VREF
∆VREF/∆VKA IKA=10mA
∆VKA=36V~10V
IREF
IKA=10mA, R1=10kΩ, R2=∞
IKA=10mA, R1=10kΩ, R2=∞
∆IREF/∆T
Ta =full Temperature
IKA(MIN) VKA=VREF
IKA(OFF) VKA=36V, VREF=0
VKA=VREF, IKA=1 to 100mA
ZKA
f≤1.0kHz
UNISONIC TECHNOLOGIES CO., LTD
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MIN TYP MAX UNIT
2.470 2.495 2.520
V
4.5
17
mV
-1.0
-0.5
1.5
-2.7
-2.0
4
0.4
1.2
µA
0.45
0.05
1.0
1.0
mA
µA
0.15
0.5
Ω
mV/V
µA
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QW-R103-003,R
TL431
LINEAR INTEGRATED CIRCUIT
■ TYPICAL CHARACTERISTICS
Cathode Current vs . Cathode Voltage
Cathode Current vs . Cathode Voltage
800
Ta=25°C
VKA =VREF
100
Ta=25°C
VKA =VREF
600
Cathode Current (mA)
Cathode Current (mA)
125
75
50
25
0
-25
400
IKA(MIN)
200
-50
0
-75
-100
-2
-200
-1
0
1
2
3
-2
-1
0
Cathode Voltage (V)
Change in Reference Input Voltage vs .
Cathode Voltage
IKA=100mA
Ta=25°C
-15
-20
-25
-30
6
5
4
3
2
1
-35
0
-40
0
5
10
15
20
25
30
35
40
0
1
Dynamic Impedance vs . Frequency
3
4
5
6
7
Small Signal Voltage Amplification vs . Frequency
70
2
10
60
Voltage Amplification (dB)
Ta=25°C
I KA=0mA to 100mA
Impedance (Ω)
2
Time (μs)
Cathode Voltage (V)
1
10
10
3
Ta=25°C
7
-5
-10
2
Pulse Response
Input and Output Voltage (V)
Change In Reference Input Voltage (mV)
0
1
Cathode Voltage (V)
0
Ta=25°C
IKA=10mA
50
40
30
20
10
0
-1
10
3
10
4
10
5
10
6
10
7
10
Frequency (Hz)
UNISONIC TECHNOLOGIES CO., LTD
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-10
3
10
10
4
10
5
10
6
10
7
Frequency (Hz)
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QW-R103-003,R
TL431
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
2.52
Reference Voltage
2.51
2.5
2.49
2.48
2.47
2.46
C
0°
C
10
80
°
C
C
40
°
60
°
C
20
°
0°
C
0°
C
-2
-4
0°
C
2.45
Temperature
140
Cathode Current, IK (mA)
120
100
80
A VKA =Vref
B VKA [email protected]=10mA
C [email protected] =10mA
D [email protected] =10mA
Ta=25℃
A
B
C
unstable
60
stable
stable
40
D
20
0
100p
1n
10n
100n
1μ
10μ
Load Capacitance, CL
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QW-R103-003,R
TL431
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
VKA
INPUT
INPUT
VKA
IKA
VKA
INPUT
IKA
IKA(OFF)
R1
IREF
UTC TL431
UTC TL431
VREF
UTC TL431
VREF
R2
VKA=VREF*(1+R1/R2)+IREF*R1
For VKA≧ VREF
For VKA=VREF
For IKA(OFF)
APPLICATION CIRCUIT
VIN
VIN
Vo UT
VIN
IN
UTC7805
OUT
COMMON
R1
R1
VREF
VREF
R2
R2
UTC TL431
UTC TL431
Shutdown Regulator
VoUT
VREF
R2
Vo=(1+R1/R2)*VREF
Output Control of a Three
-Terminal Fixed Regulator
VIN
R1
UTC TL431
Vo=(1+R1/R2)*VREF
Vo=(1+R1/R2)*VREF
VoUT
VoUT
VIN
Io
Higher-current Shunt Regulator
Io
VoUT
RCL
Rs
Rs
UTC TL431
UTC TL431
IO=VREF/RS
Constant-current Sink
RS=VREF/RCL
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.
UNISONIC TECHNOLOGIES CO., LTD
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QW-R103-003,R