TL431BM3 [CYSTEKEC]
Adjustable Precision Shunt Regulators; 可调式精密并联稳压器
| 型号： | TL431BM3 |
| 厂家： | 
CYSTECH ELECTONICS CORP. |
| 描述： | Adjustable Precision Shunt Regulators |
| 文件： | 总5页 (文件大小：162K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 1/5
CYStech Electronics Corp.
Adjustable Precision Shunt Regulators
TL431XM3
Description
SOT-89
The TL431XM3 series are three-terminal adjustable regulators with guaranteed thermal stability over
applicable temperature range. The output voltage may be set to any value between VREF (approximately
2.495 volts) and 36 volts with two external resistors. These devices have a typical dynamic output
impedance of 0.2Ω. Active output circuitry provides a very sharp turn-on characteristic, making these
devices excellent replacement for zener diodes in many applications.
Features
• Programmable output voltage
• Temperature coefficient is 50ppm/°C typical
• Temperature compensated for operation over full temperature range
• Low output noise voltage
• Fast turn on response
Classification
Rank
A
B
C
VREF
2.495±0.5%
2.495±1%
2.495±2%
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified)
Characteristics
Cathode Voltage
Symbol
Value
37
Unit
V
VKA
Cathode Current Range (Continuous)
Reference Input Current Range
Power Dissipation
IK
-100~+150
0.05~+10
770
mA
mA
mW
°C
IREF
PD
Operating Temperature Range
Storage Temperature Range
Topr
Tstg
0~+70
-65~+150
°C
TL431M3
CYStek Product Specification
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 2/5
CYStech Electronics Corp.
Functional Block Diagram
& Symbol
Functional Block Diagram :
Cathode
Symbol :
Cathode
Reference
+
-
Reference
VREF
Anode
VZ
Anode
Test Circuits
II
II
IN
IN
VZ
IN
VZ
IREF
IREF
IZ
IZ
VREF
VREF
Fig1. Test Circuit for VZ=VREF
Fig3. Test Circuit for Off-State
Current
Fig 2. Test Circuit for VZ>VREF
Note : VZ=VREF(1+R1/R2)+IREFxR1
Electrical Characteristics ( Ta=25°C unless otherwise specified )
Characteristics
Reference Input Voltage TL431A
TL431B
Symbol
Test Conditions
Min Typ Max Unit
2.445 2.495 2.545
2.470 2.495 2.520
2.480 2.495 2.510
VREF VKA=VREF, IK=10mA
V
TL431C
VKA=VREF, IK=10mA
VREF(dev)
Deviation of Reference Input Voltage
Over-Temperature
-
-
-
-
-
4
17
mV
T
min≤Ta≤Tmax
IK=10mA,
∆VREF / ∆VKA=10V-VREF
∆VKA IK=10mA,
∆KKA=36V-10V
-1.4 -2.7 mV
Ratio of Change in Reference Input
Voltage to the Change in Cathode
Voltage
-1.0 -2.0
V
IK=10mA, R1=10kΩ,
Reference Input Current
IREF
2
4
µA
µA
R2=∞
Deviation of Reference Input Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
IK=10mA, R1=10kΩ,
IREF(dev)
0.4
1.2
R2=∞, Ta=Full Range
IK(min) VKA=VREF
-
-
-
0.4
0.1
0.2
1.0 mA
Off-State Cathode Current
IK(off) VKA=36V, VREF=0
1.0
0.5
µA
VKA=VREF, f≤1.0KHz
Dynamic impedance
ZKA
Ω
IK=1 to 100mA
TL431M3
CYStek Product Specification
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 3/5
CYStech Electronics Corp.
Characteristic Curves
CATHODE CURRENT vs
CATHODE VOLTAGE
CATHODE CURRENT vs
CATHODE VOLTAGE
800
700
600
500
400
300
200
100
0
150
125
100
75
50
25
0
-25
-50
-75
-100
-100
-200
-1 -0.5
0
0.5
1
1.5
2
2.5
3
-1.5 -1 -0.5
0
0.5
1
1.5
2
2.5
V
AK - CATHODE VOLTAGE (V)
VAK - CATHODE VOLTAGE (V)
REFERENCE INPUT VOLTAGE
vs AMBIENT TEMPERATURE
REFERENCE INPUT CURRENT
vs AMBIENT TEMPERATURE
2.464
2.462
2.46
350
300
250
200
150
100
50
2.458
2.456
2.454
2.452
2.45
0
0
25
50
75
100
125
0
25
50
75
100
125
AMBIENT TEMPERATURE(
)
AMBIENT TEMPERATURE(
)
℃
℃
CATHODE VOLTAGE vs REFERENCE
INPUT VOLTAGE
DYNAMIC IMPEDANCE vs FREQUENCE
0
-5
100
10
1
-10
-15
-20
-25
-30
0.1
0
5
10 15 20 25 30 35 40
1
10
100
1000
VKA - CATHODE VOLTAGE (V)
f - FREQUENCE (KHz)
TL431M3
CYStek Product Specification
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 4/5
CYStech Electronics Corp.
OPEN-LOOP VOLTAGE GAIN
vs FREQUENCY
40
30
20
10
0
1
10
100
1000
F - FREQUENCY (KHz)
TL431M3
CYStek Product Specification
Spec. No. : C502M3
Issued Date : 2003.04.02
Revised Date : 2005.04.20
Page No. : 5/5
CYStech Electronics Corp.
SOT-89 Dimension
Marking:
A
2
1
3
431
H
C
D
B
Style: Pin 1. Reference 2. Anode
3. Cathode
E
I
F
3-Lead SOT-89 Plastic
Surface Mounted Package
CYStek Package Code: M3
G
*: Typical
Millimeters
Inches
Min. Max.
Millimeters
Inches
Min. Max.
DIM
DIM
Min.
Max.
4.60
4.25
1.70
2.60
0.51
Min.
1.48
2.96
1.40
0.35
Max.
1.527
3.04
1.60
0.41
A
B
C
D
E
0.1732 0.1811
0.1594 0.1673
0.0591 0.0663
0.0945 0.1024
0.01417 0.0201
4.40
4.05
1.50
2.40
0.36
F
G
H
I
0.0583 0.0598
0.1165 0.1197
0.0551 0.0630
0.0138 0.0161
Notes: 1.Controlling dimension: millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
• Lead: 42 Alloy ; solder plating
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
• CYStek reserves the right to make changes to its products without notice.
• CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
TL431M3
CYStek Product Specification
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