SLVS543P
August 2004 – November 2018
TL431
,
TL432
PRODUCTION DATA.
1
Features
2
Applications
Simplified Schematic
3
Description
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Thermal Information
7.4
Recommended Operating Conditions
7.5
Electrical Characteristics, TL431C, TL432C
7.6
Electrical Characteristics, TL431I, TL432I
7.7
Electrical Characteristics, TL431Q, TL432Q
7.8
Electrical Characteristics, TL431AC, TL432AC
7.9
Electrical Characteristics, TL431AI, TL432AI
7.10
Electrical Characteristics, TL431AQ, TL432AQ
7.11
Electrical Characteristics, TL431BC, TL432BC
7.12
Electrical Characteristics, TL431BI, TL432BI
7.13
Electrical Characteristics, TL431BQ, TL432BQ
7.14
Typical Characteristics
8
Parameter Measurement Information
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.4
Device Functional Modes
9.4.1
Open Loop (Comparator)
9.4.2
Closed Loop
10
Applications and Implementation
10.1
Application Information
10.2
Typical Applications
10.2.1
Comparator With Integrated Reference
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.2.1
Basic Operation
10.2.1.2.1.1
Overdrive
10.2.1.2.2
Output Voltage and Logic Input Level
10.2.1.2.2.1
Input Resistance
10.2.1.3
Application Curve
10.2.2
Shunt Regulator/Reference
10.2.2.1
Design Requirements
10.2.2.2
Detailed Design Procedure
10.2.2.2.1
Programming Output/Cathode Voltage
10.2.2.2.2
Total Accuracy
10.2.2.2.3
Stability
10.2.2.2.4
Start-Up Time
10.2.2.3
Application Curve
10.3
System Examples
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Nomenclature
13.2
Related Links
13.3
Receiving Notification of Documentation Updates
13.4
Community Resources
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
D|8
MSOI002K
PW|8
MPDS568
PK|3
MHSI001B
LP|3
MSOT002D
PS|8
MSOP001A
DCK|6
MPDS114C
DBV|5
MPDS018O
P|8
MPDI001B
DBZ|3
MPDS108D
Thermal pad, mechanical data (Package|Pins)
PK|3
PPTD070
PS|8
QFND376
DCK|6
QFND228B
Orderable Information
slvs543p_oa
slvs543p_pm
10.3
System Examples
A.
R should provide cathode current ≥1 mA to the TL431 at minimum V
(BATT)
.
Figure 29.
Precision High-Current Series Regulator
Figure 30.
Output Control of a Three-Terminal Fixed Regulator
Figure 31.
High-Current Shunt Regulator
A.
Refer to the stability boundary conditions in
Figure 16
and
Figure 18
to determine allowable values for C.
Figure 32.
Crowbar Circuit
Figure 33.
Precision 5-V, 1.5-A Regulator
A.
R
b
should provide cathode current ≥1 mA to the TL431.
Figure 34.
Efficient 5-V Precision Regulator
Figure 35.
PWM Converter With Reference
A.
Select R3 and R4 to provide the desired LED intensity and cathode current ≥1 mA to the TL431 at the available V
I(BATT)
.
Figure 36.
Voltage Monitor
Figure 37.
Delay Timer
Figure 38.
Precision Current Limiter
Figure 39.
Precision Constant-Current Sink