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TL431

器件型号:TL431
器件类别:半导体    电源管理   
厂商名称:Texas Instruments
厂商官网:http://www.ti.com/
标准:
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器件描述

TL431 2% Accuracy Adjustable Precision Shunt Regulator

参数
产品属性属性值
I I(dev)(uA)2.5
Temp coeff(Max)(ppm/ degree C)92
Temp coeff(Typ)(ppm/ degree C)34
Iout/Iz(Max)(mA)100
Iref(uA)4
Pin/package3SOT-23, 3SOT-89, 3TO-92, 5SOT-23, 6SC70, 8PDIP, 8SO, 8SOIC, 8TSSOP
RatingCatalog
Initial accuracy(Max)(%)0.5,1,2
VO adj(Max)(V)36
VO(V)2.495
Package GroupPDIP|8,SC70|6,SOIC|8,SOT-23|3,SOT-23|5,SOT-89|3,SO|8,TO-92|3,TSSOP|8
VO adj(Min)(V)2.495
Operating temperature range(C)-40 to 85,-40 to 125,0 to 70
Approx. price(US$)0.06 | 1ku
Iq(Typ)(uA)400
Reference voltageAdjustable
Iz for regulation(Min)(uA)400

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TL431, TL432
SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018
TL431 / TL432 Precision Programmable Reference
1 Features
1
3 Description
The
TL431LI / TL432LI
are pin-to-pin alternatives
to TL431 / TL432. TL43xLI offers better stability,
lower temperature drift (V
I(dev)
), and lower
reference current (I
ref
) for improved system
accuracy.
The TL431 and TL432 devices are three-terminal
adjustable shunt regulators, with specified thermal
stability over applicable automotive, commercial, and
military temperature ranges. The output voltage can
be set to any value between V
ref
(approximately
2.5 V) and 36 V, with two external resistors. These
devices have a typical output impedance of 0.2
Ω.
Active output circuitry provides a very sharp turn-on
characteristic, making these devices excellent
replacements for Zener diodes in many applications,
such as onboard regulation, adjustable power
supplies, and switching power supplies. The TL432
device has exactly the same functionality and
electrical specifications as the TL431 device, but has
different pinouts for the DBV, DBZ, and PK packages.
Both the TL431 and TL432 devices are offered in
three grades, with initial tolerances (at 25°C) of 0.5%,
1%, and 2%, for the B, A, and standard grade,
respectively. In addition, low output drift versus
temperature ensures good stability over the entire
temperature range.
The TL43xxC devices are characterized for operation
from 0°C to 70°C, the TL43xxI devices are
characterized for operation from –40°C to 85°C, and
the TL43xxQ devices are characterized for operation
from –40°C to 125°C.
Device Information
(1)
PART NUMBER
PACKAGE (PIN)
SOT-23-3 (3)
SOT-23-5 (5)
TL43x
SOIC (8)
PDIP (8)
SOP (8)
BODY SIZE (NOM)
2.90 mm × 1.30 mm
2.90 mm × 1.60 mm
4.90 mm × 3.90 mm
9.50 mm × 6.35 mm
6.20 mm × 5.30 mm
Reference Voltage Tolerance at 25°C
– 0.5% (B Grade)
– 1% (A Grade)
– 2% (Standard Grade)
Adjustable Output Voltage: V
ref
to 36 V
Operation From
−40°C
to 125°C
Typical Temperature Drift (TL43xB)
– 6 mV (C Temp)
– 14 mV (I Temp, Q Temp)
Low Output Noise
0.2-Ω Typical Output Impedance
Sink-Current Capability: 1 mA to 100 mA
2 Applications
Adjustable Voltage and Current Referencing
Secondary Side Regulation in Flyback SMPSs
Zener Replacement
Voltage Monitoring
Comparator with Integrated Reference
Simplified Schematic
Input
I
KA
V
KA
V
ref
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TL431, TL432
SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features
..................................................................
Applications
...........................................................
Description
.............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions
.........................
Specifications.........................................................
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
1
1
1
2
3
4
5
9
Detailed Description
............................................
20
9.1
9.2
9.3
9.4
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
20
20
21
21
10 Applications and Implementation......................
22
10.1 Application Information..........................................
22
10.2 Typical Applications ..............................................
22
10.3 System Examples .................................................
27
Absolute Maximum Ratings ......................................
5
ESD Ratings..............................................................
5
Thermal Information ..................................................
5
Recommended Operating Conditions.......................
5
Electrical Characteristics, TL431C, TL432C .............
6
Electrical Characteristics, TL431I, TL432I ................
7
Electrical Characteristics, TL431Q, TL432Q.............
8
Electrical Characteristics, TL431AC, TL432AC ........
9
Electrical Characteristics, TL431AI, TL432AI .........
10
Electrical Characteristics, TL431AQ, TL432AQ....
11
Electrical Characteristics, TL431BC, TL432BC ....
12
Electrical Characteristics, TL431BI, TL432BI .......
13
Electrical Characteristics, TL431BQ, TL432BQ....
14
Typical Characteristics ..........................................
15
11 Power Supply Recommendations
.....................
30
12 Layout...................................................................
30
12.1 Layout Guidelines .................................................
30
12.2 Layout Example ....................................................
30
13 Device and Documentation Support
.................
31
13.1
13.2
13.3
13.4
13.5
13.6
13.7
Device Nomenclature............................................
Related Links ........................................................
Receiving Notification of Documentation Updates
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
31
31
31
31
31
32
32
8
Parameter Measurement Information
................
19
14 Mechanical, Packaging, and Orderable
Information
...........................................................
32
4 Revision History
Changes from Revision O (January 2015) to Revision P
Page
Added text to the
Description
section.....................................................................................................................................
1
Added
TL43x Device Comparison Table
...............................................................................................................................
3
Added
TL43x Device Nomenclature
section ........................................................................................................................
31
Changes from Revision N (January 2014) to Revision O
Page
Added
Applications, Device Information
table,
Pin Functions
table,
ESD Ratings
table,
Thermal Information
table,
Feature Description
section,
Device Functional Modes, Application and Implementation
section,
Power Supply
Recommendations
section,
Layout
section,
Device and Documentation Support
section, and
Mechanical,
Packaging, and Orderable Information
section. .....................................................................................................................
1
Added Applications. ................................................................................................................................................................
1
Moved
Typical Characteristics
into
Specifications
section. .................................................................................................
15
Changes from Revision M (July 2012) to Revision N
Page
Updated document formatting ................................................................................................................................................
1
Removed
Ordering Information
table. ....................................................................................................................................
4
Added Application Note links................................................................................................................................................
22
2
Submit Documentation Feedback
Product Folder Links:
TL431 TL432
Copyright © 2004–2018, Texas Instruments Incorporated
TL431, TL432
www.ti.com
SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018
5 Device Comparison Table
DEVICE PINOUT
TL431
TL432
INITIAL ACCURACY
B: 0.5%
A: 1%
(Blank): 2%
OPERATING FREE-AIR TEMPERATURE (T
A
)
C: 0°C to 70°C
I: -40°C to 85°C
Q: -40°C to 125°C
Copyright © 2004–2018, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links:
TL431 TL432
3
TL431, TL432
SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018
www.ti.com
6 Pin Configuration and Functions
TL431, TL431A, TL431B . . . LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
TL431 . . . KTP (PowerFLEX /TO-252) PACKAGE
(TOP VIEW)
TL431A, TL431B . . . DCK (SC-70) PACKAGE
(TOP VIEW)
CATHODE
ANODE
REF
ANODE
CATHODE
ANODE
REF
CATHODE
NC
REF
1
2
3
6
5
4
ANODE
NC
NC
NC − No internal connection
TL431, TL431A, TL431B . . . D (SOIC) PACKAGE
(TOP VIEW)
TL431, TL431A, TL431B . . . P (PDIP), PS (SOP),
OR PW (TSSOP) PACKAGE
(TOP VIEW)
CATHODE
ANODE
ANODE
NC
1
2
3
4
8
7
6
5
REF
ANODE
ANODE
NC
CATHODE
NC
NC
NC
1
2
3
4
8
7
6
5
REF
NC
ANODE
NC
NC − No internal connection
NC − No internal connection
TL431, TL431A, TL431B . . . PK (SOT-89) PACKAGE
(TOP VIEW)
TL432, TL432A, TL432B . . . PK (SOT-89) PACKAGE
(TOP VIEW)
CATHODE
ANODE
ANODE
REF
ANODE
REF
ANODE
CATHODE
TL431, TL431A, TL431B . . . DBV (SOT-23-5) PACKAGE
(TOP VIEW)
TL432, TL432A, TL432B . . . DBV (SOT-23-5) PACKAGE
(TOP VIEW)
NC
1
2
3
5
4
ANODE
REF
NC
ANODE
NC
1
2
3
5
4
REF
CATHODE
CATHODE
NC − No internal connection
Pin 2 is attached to Substrate and must be
connected to ANODE or left open.
NC − No internal connection
TL431, TL431A, TL431B . . . DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
TL432, TL432A, TL432B . . . DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
CATHODE
REF
1
3
2
REF
ANODE
CATHODE
1
3
2
ANODE
Pin Functions
PIN
TLV431x
NAME
CATHODE
REF
ANODE
DBZ
1
2
3
DBV
3
4
5
PK
3
1
2
D
1
8
2, 3,
6, 7
P, PS
PW
1
8
6
LP
1
3
2
KTP
1
3
2
DCK
1
3
6
DBZ
2
1
3
TLV432x
DBV
4
5
2
PK
1
3
2
I/O
I
O
Shunt Current/Voltage input
Threshold relative to common anode
Common pin, normally connected to ground
TYPE
DESCRIPTION
4
Submit Documentation Feedback
Product Folder Links:
TL431 TL432
Copyright © 2004–2018, Texas Instruments Incorporated
TL431, TL432
www.ti.com
SLVS543P – AUGUST 2004 – REVISED NOVEMBER 2018
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)
MIN
V
KA
I
KA
I
I(ref)
T
J
T
stg
(1)
(2)
Cathode voltage
(2)
Continuous cathode current range
Reference input current range
Operating virtual junction temperature
Storage temperature range
–65
–100
–0.05
MAX
37
150
10
150
150
UNIT
V
mA
mA
°C
°C
Stresses beyond those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under
Recommended Operating
Conditions
is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltage values are with respect to ANODE, unless otherwise noted.
7.2 ESD Ratings
VALUE
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001
V
(ESD)
(1)
(2)
Electrostatic discharge
(1)
UNIT
V
±2000
±1000
Charged-device model (CDM), per JEDEC specification JESD22-
C101
(2)
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Manufacturing with
less than 500-V HBM is possible with the necessary precautions.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Manufacturing with
less than 250-V CDM is possible with the necessary precautions.
7.3 Thermal Information
TL43xx
THERMAL METRIC
(1)
P
PW
8 PINS
R
θJA
R
θJC(top)
Junction-to-ambient thermal
resistance
Junction-to-case (top) thermal
resistance
85
57
149
65
97
39
95
46
D
PS
DCK
6 PINS
259
87
DBV
5 PINS
206
131
206
76
DBZ
LP
3 PINS
140
55
52
°C/W
9
PK
UNIT
(1)
For more information about traditional and new thermal metrics, see the
IC Package Thermal Metrics
application report (SPRA953).
7.4 Recommended Operating Conditions
See
(1)
MIN
V
KA
I
KA
T
A
Cathode voltage
Cathode current
TL43xxC
Operating free-air temperature
TL43xxI
TL43xxQ
(1)
V
ref
1
0
–40
–40
MAX
36
100
70
85
125
°C
UNIT
V
mA
Maximum power dissipation is a function of T
J(max)
,
θ
JA
, and T
A
. The maximum allowable power dissipation at any allowable ambient
temperature is P
D
= (T
J(max)
– T
A
)/θ
JA
. Operating at the absolute maximum T
J
of 150°C can affect reliability.
Copyright © 2004–2018, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Links:
TL431 TL432
5

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