UTCTL431中文资料

Fig 10 Test Circuit For IKA(OFF)
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R103-003,J
UTC TL431 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
Vi
Vo
Vi
Vo
Vi
IN UTC7805 OUT
Fig 13 Higher-current Shunt Regulator
Vi
Io Vo
Vi
Io
Vo
RCL
Rs
UTC TL431
Rs IO=VREF/RS
Fig 14 Constant-current Sink
UTC TL431
RS=VREF/RCL
Fig 15 Current Limiting or Current Source
Vo
COMMON
R1
R1
R1
VREF R2
UTC TL431
Vo=(1+R1/R2)*VREF
UTC TL431
VREF R2
Vo=(1+R1/R2)*VREF
VREF R2
UTC TL431
Vo=(1+R1/R2)*VREF
Fig 11 Shutdown Regulator
Fig 12 Output Control of a Three -Terminal Fixed Regulator
∆VKA=10V~VREF IKA=10mA ∆VKA=36V~10V
IKA=10mA,R1=10kΩ,R2=∞ IKA=10mA,R1=10kΩ,R2=∞ TA=full Temperature VKA=VREF
VKA=36V,VREF=0 VKA=VREF, IKA=1 to 100mA f≤1.0kHz
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
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R103-003,J
UTC TL431 LINEAR INTEGRATED CIRCUIT
TO-92
reference voltage
temperature Fig. 7
CATHODE CURRENT,IK (mA)
140
PARAMETER
SYMBOL
VALUE
UNIT
Cathode Voltage
VKA
37
V
Cathode Current Range(Continuous)
IKA
-100 ~ +150
mA
Reference Input Current Range
Iref
-0.05 ~ +10
mA
Operating Junction Temperature
Fig 6 Small Signal Voltage Amplification Vs Frequency
70
60
Ta=25°C
IKA=10mA
50
40
30
Voltage Amplification (dB)
20 10 0
-10
10 3
10 4
10 5
10 6
10 7
Frequency (Hz)
Impedance (Ω)?
VKA
VREF
Cathode Current
IKA
1
MAX 36 100
UNIT V mA
ELECTRICAL CHARACTERISTICS(Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
4.5 17 mV
-1.0 -2.7 mV/V -0.5 -2.0
1.5 4 µA 0.4 1.2 µA
0.45 1.0 mA
0.05 1.0 µA 0.15 0.5 Ω
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R103-003,J
UTC TL431 LINEAR INTEGRATED CIRCUIT
UTC TL431 LINEAR INTEGRATED CIRCUIT
PROGRAMMABLE PRECISION
REFERENCE
1
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.
TYPICAL PERFORMANCE CHARACTERISTICS
Cathode Current (mA)
Change In Reference INput Voltage (mV)
Fig 1 Cathode Current Vs Cathode Voltage
125
100
Ta=25°C VKA=VREF
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.
Cathode Voltage (V)
Fig 5 Dynamic Impedance Vs Frequency
10 2
Ta=25°C IKA=0mA to 100mA
10 1
10 0
10-1
10 3
10 4
10 5
10 6
10 7
Frequency (Hz)
Cathode Current (mA)
Fig 2 Cathode Current Vs Cathode Voltage
VREF
UTC TL431
INPUT
R1 IREF
R2 VREF
VKA IKA
UTC TL431
INPUT
VKA IKA(OFF)
UTC TL431
Fig 8 Test Circuit For VKA=VREF
VKA=VREF*(1+R1/R2)+IREF*R1
Fig 9 Test Circuit for VKA >= VREF
TO-92 1: Ref. ; 2: Anode ; 3: Cathode SOT-89 1: Ref. ; 2: Anode ; 3: Cathode SOT-23 See MARKING INFORMATION SOT-25 1,2: NC; 3: Cathode; 4: Ref.; 5: Anode
REFERENCE (R)
CATHODE (K)
ANODE(A)
ANODE
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R103-003,J
UTC TL431 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Operating temperature range applies unless otherwise specified))
MARKING INFORMATION (SOT-23)
PART NUMBER
PIN 1
PIN 2
TL431
Cathode
Ref
TL431-NS
Ref
Cathode
PIN 3 Anode Anode
MARKING 431 431N
BLOCK DIAGRAM
REFERENCE
2.5V Vref
CATHODE
typical for operation over full rated operating temperature range.
1 SOT-89
TO-92
2 1
3 SOT-23
SOP-8
1 2
3
5 4
SOT-25
SOP-8 1: Cathode; 2,3,6,7: Anode 8: Ref. ; 4,5: N.C.
A VKA=Vref
AB
120 B VKA=5.0V@IK=10mA
C VKA=10V@IK=10mA
100 D VKA=15V@IK=10mA
Ta=25℃
C
80
60
40
20
D
0
100p
1n
10n
100n
1μ
LOAD CAPACITANCE,CL
10μ
TEST CIRCUIT
INPUT
VKA IKA
Minimum Cathode Current for
IKA(min)
Regulation
Off-State Cathode Current
IKA(OFF)
Dynamic Impedance
ZKA
Note:TMIN=0°C,TMAX=+70°C
VKA=VREF,IKA=10mA TMIN<=TA<=TMAX
Tj
150
°C
Operating Ambient Temperature
Topr
-40 ~ +85
°C
Storage Temperature
Tstg
-65 ~ +150
°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
MIN
TYP
Cathode Voltage
800
600
Ta=25°C VKA=VREF
400 IKA(min)
200
0
-200
-2
-1
0
1
2
3
Cathode Voltage (V)
Fig 4 Pulse Response
7
Ta=25°C
6
5
4
3
2
1
0
0
12
3
4
5
6
7
Time (µ s)
Input and Output Voltage (V)
Reference Input Voltage
Vref
VKA=VREF,IKA=10mA
2.470 2.495 2.520 V
Deviation of reference Input Voltage ∆Vref/∆T
Over temperature (note 1)
Ratio of Change in Reference Input
75
50
25
0
-25
-50
-75
-100 -2
-1
0
1
2
3
Cathode Voltage (V)
Fig 3 Change in Reference Input Voltage Vs e voltage
0
-5
IKA=100mA
-10
Ta=25°C
-15
-20
-25
-30
-35
-40 0
5
10 15 20 25 30 35 40
Voltage to the Change in Cathode ∆Vref /∆VKA
Voltage
Reference Input Current
Iref
Deviation of Reference Input Current ∆Iref/∆T
Over Full Temperature Range