TS431B Taiwan Semiconductor, TS431B Datasheet

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TS431B

Manufacturer Part Number
TS431B
Description
Adjustable Precision Shunt Regulator
Manufacturer
Taiwan Semiconductor
Datasheet

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TS431/A/B
General Description
The TS431/431A/431B integrated circuits are three-terminal programmable shunt regulator diodes. These monolithic IC
voltage references operate as a low temperature coefficient zener which is programmable from Vref to 36 volts with two
external resistors. These devices exhibit a wide operating current range of 1.0 to 100mA with a typical dynamic
impedance of 0.22Ω. The characteristics of these references make them excellent replacements for zener diodes in many
applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5volt reference makes it convenient to
obtain a stable reference from 5.0volt logic supplies, and since The TS431/431A/431B operates as a shunt regulator, it
can be used as either a positive or negative stage reference.
This series is offered in 3-pin TO-92, SOT-89, SOT-23 and SOP-8 package.
Features
Block Diagram
Pin Assignment
TS431/A/BCT
Precision Reference Voltage
TS431
TS431A 2.495V±1%
TS431B 2.495V±0.5%
Equivalent Full Range Temp. Coefficient: 50ppm/
Programmable Output Voltage up to 36V
Fast Turn-On Response
Sink Current Capability of 1.0 to 100 mA
Low Dynamic Output Impedance: 0.22Ω
Low Output Noise
1
2
3
2.495V±2%
TS431/A/BCY
1
2
3
Adjustable Precision Shunt Regulator
Pin No.
TS431/A/BCX
TS431/431A/431B
1-8
1
3
2
o
C
TS431/A/BCS
Standard Application
Ordering Information
Note: Where x denotes voltage tolerance.
TS431xCT
TS431xCY
TS431xCX
TS431xCS
Sink Current Capability up to 100mA
Part No.
2,3,6,7
Blank: ±2%
4,5
8
1
B: ±0.5%
A: ±1%
Operating Temp.
Reference
Anode
Cathode
Non connect
-20 ~ +85
(Ambient)
2003/12 rev. B
Description
o
C
Pin
TO-92
SOT-89
SOT-23
SOP-8
Package

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TS431B Summary of contents

Page 1

... This series is offered in 3-pin TO-92, SOT-89, SOT-23 and SOP-8 package. Features Precision Reference Voltage TS431 2.495V±2% TS431A 2.495V±1% TS431B 2.495V±0.5% Equivalent Full Range Temp. Coefficient: 50ppm/ Programmable Output Voltage up to 36V Fast Turn-On Response Sink Current Capability of 1.0 to 100 mA Low Dynamic Output Impedance: 0.22Ω ...

Page 2

... Cathode Current Range (for regulation) Electrical Characteristics o (Ta=25 C, unless otherwise specified.) Parameter Symbo TS431 Reference voltage Vref TS431A TS431B Deviation of reference input ∆Vref voltage, over temp. (Note 4) Reference Input current Iref Radio of change in Vref to ∆Vref / change in cathode Voltage ∆Vka Deviation of reference input Iref(DEV) current, over temp ...

Page 3

Electrical Characteristics (continued) Note 4. Deviation of reference input voltage, VDEV, is defined as the maximum deviation of the reference over the full temperature range. The average temperature coefficient of the reference input voltage αVref is defined as: | αVref ...

Page 4

Application Examples TS431/A/B 4-8 2003/12 rev. B ...

Page 5

Application Examples TS431/A/B 5-8 2003/12 rev. B ...

Page 6

Typical Performance Characteristics TS431/A/B 6-8 2003/12 rev. B ...

Page 7

TO-92 Mechanical Drawing SOT-89 Mechanical Drawing TS431/A/B TO-92 DIMENSION MILLIMETERS DIM MIN A 4.30 B 4.30 C 14.30(typ) D 0.43 E 2.19 F 3.30 G 2.42 ...

Page 8

SOT-23 Mechanical Drawing SOP-8 Mechanical Drawing TS431/A/B F SOT-23 DIMENSION MILLIMETERS DIM MIN A 2.88 B 0.39 C 1.78 D 0.51 E 1.59 ...

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