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TL431, TL432 Precision Programmable Reference
SLVS543S
August 2004 – May 2024
TL431
,
TL432
PRODUCTION DATA
CONTENTS
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TL431, TL432 Precision Programmable Reference
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Thermal Information
6.4
Recommended Operating Conditions
6.5
Electrical Characteristics, TL431C, TL432C
6.6
Electrical Characteristics, TL431I, TL432I
6.7
Electrical Characteristics, TL431Q, TL432Q
6.8
Electrical Characteristics, TL431AC, TL432AC
6.9
Electrical Characteristics, TL431AI, TL432AI
6.10
Electrical Characteristics, TL431AQ, TL432AQ
6.11
Electrical Characteristics, TL431BC, TL432BC
6.12
Electrical Characteristics, TL431BI, TL432BI
6.13
Electrical Characteristics, TL431BQ, TL432BQ
6.14
Typical Characteristics
7
Parameter Measurement Information
7.1
Temperature Coefficient
7.2
Dynamic Impedance
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.4
Device Functional Modes
8.4.1
Open Loop (Comparator)
8.4.2
Closed Loop
9
Applications and Implementation
9.1
Application Information
9.2
Typical Applications
9.2.1
Comparator With Integrated Reference
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Basic Operation
9.2.1.2.1.1
Overdrive
9.2.1.2.2
Output Voltage and Logic Input Level
9.2.1.2.2.1
Input Resistance
9.2.1.3
Application Curve
9.2.2
Shunt Regulator/Reference
9.2.2.1
Design Requirements
9.2.2.2
Detailed Design Procedure
9.2.2.2.1
Programming Output/Cathode Voltage
9.2.2.2.2
Total Accuracy
9.2.2.2.3
Stability
9.2.2.2.4
Start-Up Time
9.2.2.3
Application Curve
9.3
System Examples
9.4
Power Supply Recommendations
9.5
Layout
9.5.1
Layout Guidelines
9.5.2
Layout Example
10
Device and Documentation Support
10.1
Device Nomenclature
10.2
Related Links
10.3
Receiving Notification of Documentation Updates
10.4
Support Resources
10.5
Trademarks
10.6
Electrostatic Discharge Caution
10.7
Glossary
11
Revision History
12
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
D|8
MSOI002K
PW|8
MPDS568
PK|3
MHSI001B
LP|3
MSOT002D
PS|8
MSOP001A
DCK|6
MPDS114F
DBV|5
MPDS018T
P|8
MPDI001B
DBZ|3
MPDS108G
Thermal pad, mechanical data (Package|Pins)
PK|3
PPTD070
PS|8
QFND376
Orderable Information
slvs543s_oa
slvs543s_pm
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Data Sheet
TL431, TL432 Precision Programmable Reference
1
Features
Reference voltage tolerance at 25°C
0.5% (B grade)
1% (A grade)
2% (Standard grade)
Adjustable output voltage: V
ref
to 36V
Operation from −40°C to 125°C
Typical temperature drift (TL43xB)
6mV (C temp)
14mV (I temp, Q temp)
Low Output Noise
0.2Ω Typical output impedance
Sink-current capability: 1mA to 100mA
2
Applications
Rack server power
Industrial AC/DC
AC inverter & VF drives
Servo drive control module
Notebook PC power adapter design
Simplified Schematic