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TI-TL432B.pdf
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V
ref
Input
V
KA
I
KA
Product
Folder
Sample &
Buy
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Documents
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Software
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Community
TL431
,
TL431A
,
TL431B
TL432
,
TL432A
,
TL432B
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
TL43xx Precision Programmable Reference
1 Features 3 Description
The TL431 and TL432 devices are three-terminal
1
• Reference Voltage Tolerance at 25°C
adjustable shunt regulators, with specified thermal
– 0.5% (B Grade)
stability over applicable automotive, commercial, and
– 1% (A Grade)
military temperature ranges. The output voltage can
be set to any value between V
ref
(approximately
– 2% (Standard Grade)
2.5 V) and 36 V, with two external resistors. These
• Adjustable Output Voltage: V
ref
to 36 V
devices have a typical output impedance of 0.2 Ω.
• Operation From −40°C to 125°C
Active output circuitry provides a very sharp turn-on
characteristic, making these devices excellent
• Typical Temperature Drift (TL431B)
replacements for Zener diodes in many applications,
– 6 mV (C Temp)
such as onboard regulation, adjustable power
– 14 mV (I Temp, Q Temp)
supplies, and switching power supplies. The TL432
• Low Output Noise
device has exactly the same functionality and
electrical specifications as the TL431 device, but has
• 0.2-Ω Typical Output Impedance
different pinouts for the DBV, DBZ, and PK packages.
• Sink-Current Capability: 1 mA to 100 mA
Both the TL431 and TL432 devices are offered in
•
three grades, with initial tolerances (at 25° C) of 0.5%,
2 Applications
1%, and 2%, for the B, A, and standard grade,
• Adjustable Voltage and Current Referencing
respectively. In addition, low output drift versus
temperature ensures good stability over the entire
• Secondary Side Regulation in Flyback SMPSs
temperature range.
• Zener Replacement
The TL43xxC devices are characterized for operation
• Voltage Monitoring
from 0°C to 70°C, the TL43xxI devices are
• Comparator with Integrated Reference
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) BODY SIZE (NOM)
SOT-23-3 (3) 2.90 mm x 1.30 mm
SOT-23-5 (5) 2.90 mm x 1.60 mm
TL43xx SOIC (8) 4.90 mm x 3.90 mm
PDIP (8) 9.50 mm x 6.35 mm
SOP (8) 6.20 mm x 5.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
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
,
TL431A
,
TL431B
TL432
,
TL432A
,
TL432B
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features.................................................................. 1 8 Parameter Measurement Information ................ 18
2 Applications ........................................................... 1 9 Detailed Description ............................................ 19
9.1 Overview ................................................................. 19
3 Description ............................................................. 1
9.2 Functional Block Diagram ....................................... 19
4 Simplified Schematic............................................. 1
9.3 Feature Description................................................. 20
5 Revision History..................................................... 2
9.4 Device Functional Modes........................................ 20
6 Pin Configuration and Functions......................... 3
10 Applications and Implementation...................... 21
7 Specifications......................................................... 4
10.1 Application Information.......................................... 21
7.1 Absolute Maximum Ratings ...................................... 4
10.2 Typical Applications .............................................. 21
7.2 ESD Ratings.............................................................. 4
10.3 System Examples ................................................. 26
7.3 Thermal Information.................................................. 4
11 Power Supply Recommendations ..................... 29
7.4 Recommended Operating Conditions....................... 4
12 Layout................................................................... 29
7.5 Electrical Characteristics, TL431C, TL432C............. 5
12.1 Layout Guidelines ................................................. 29
7.6 Electrical Characteristics, TL431I, TL432I ................ 6
12.2 Layout Example .................................................... 29
7.7 Electrical Characteristics, TL431Q, TL432Q............. 7
13 Device and Documentation Support ................. 30
7.8 Electrical Characteristics, TL431AC, TL432AC ........ 8
13.1 Related Links ........................................................ 30
7.9 Electrical Characteristics, TL431AI, TL432AI ........... 9
13.2 Trademarks........................................................... 30
7.10 Electrical Characteristics, TL431AQ, TL432AQ.... 10
13.3 Electrostatic Discharge Caution............................ 30
7.11 Electrical Characteristics, TL431BC, TL432BC .... 11
13.4 Glossary................................................................ 30
7.12 Electrical Characteristics, TL431BI, TL432BI ....... 12
7.13 Electrical Characteristics, TL431BQ, TL432BQ.... 13 14 Mechanical, Packaging, and Orderable
Information ........................................................... 30
7.14 Typical Characteristics.......................................... 14
5 Revision History
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. ................................................................................................. 14
Changes from Revision M (July 2012) to Revision N Page
• Updated document formatting ................................................................................................................................................ 1
• Removed Ordering Information table. .................................................................................................................................... 3
• Added Application Note links................................................................................................................................................ 21
Changes from Revision K (June 2010) to Revision L Page
• Deleted T
A
values under TEST CONDITIONS for V
I(dev)
and I
I(dev)
PARAMETERS in the Electrical Characteristics table. .. 5
2 Submit Documentation Feedback Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B
1
2
3
4
8
7
6
5
CATHODE
ANODE
ANODE
NC
REF
ANODE
ANODE
NC
TL431, TL431A, TL431B . . . D (SOIC) PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
CATHODE
NC
NC
NC
REF
NC
ANODE
NC
TL431, TL431A, TL431B . . . P (PDIP), PS (SOP),
OR PW (TSSOP) PACKAGE
(TOP VIEW)
NC − No internal connection
TL431, TL431A, TL431B . . . DBV (SOT-23-5) PACKAGE
(TOP VIEW)
1
2
3
5
4
NC
†
CATHODE
ANODE
REF
TL431, TL431A, TL431B . . . PK (SOT-89) PACKAGE
(TOP VIEW)
REF
ANODE
CATHODE
†
Pin 2 is attached to Substrate and must be
connected to ANODE or left open.
NC − No internal connection
TL432, TL432A, TL432B . . . DBV (SOT-23-5) PACKAGE
(TOP VIEW)
1
2
3
5
4
NC
ANODE
NC
REF
CATHODE
NC − No internal connection
TL431, TL431A, TL431B . . . DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
TL432, TL432A, TL432B . . . DBZ (SOT-23-3) PACKAGE
(TOP VIEW)
NC − No internal connection
1
2
3
REF
CATHODE
ANODE
1
2
3
CATHODE
REF
ANODE
ANODE
TL432, TL432A, TL432B . . . PK (SOT-89) PACKAGE
(TOP VIEW)
REF
ANODE
CATHODE
ANODE
CATHODE
ANODE
REF
TL431 . . . KTP (PowerFLEX /TO-252) PACKAGE
(TOP VIEW)
ANODE
TL431A, TL431B . . . DCK (SC-70) PACKAGE
(TOP VIEW)
1
2
3
6
5
4
CATHODE
NC
REF
ANODE
NC
NC
NC − No internal connection
TL431, TL431A, TL431B . . . LP (TO-92/TO-226) PACKAGE
(TOP VIEW)
CATHODE
ANODE
REF
TL431
,
TL431A
,
TL431B
TL432
,
TL432A
,
TL432B
www.ti.com
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
6 Pin Configuration and Functions
Pin Functions
PIN
TLV431x TLV432x
TYPE DESCRIPTION
NAME
P, PS
DBZ DBV PK D LP KTP DCK DBZ DBV PK
PW
CATHODE 1 3 3 1 1 1 1 1 2 4 1 I/O Shunt Current/Voltage input
REF 2 4 1 8 8 3 3 3 1 5 3 I Threshold relative to common anode
2, 3,
ANODE 3 5 2 6 2 2 6 3 2 2 O Common pin, normally connected to ground
6, 7
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B
TL431
,
TL431A
,
TL431B
TL432
,
TL432A
,
TL432B
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
www.ti.com
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
(1)
MIN MAX UNIT
V
KA
Cathode voltage
(2)
37 V
I
KA
Continuous cathode current range –100 150 mA
I
I(ref)
Reference input current range –0.05 10 mA
T
J
Operating virtual junction temperature 150 °C
T
stg
Storage temperature range –65 150 °C
(1) 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.
(2) All voltage values are with respect to ANODE, unless otherwise noted.
7.2 ESD Ratings
VALUE UNIT
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001
(1)
±2000
V
(ESD)
Electrostatic discharge V
Charged-device model (CDM), per JEDEC specification JESD22- ±1000
C101
(2)
(1) 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.
(2) 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 D PS DCK DBV DBZ LP PK UNIT
8 PINS 6 PINS 5 PINS 3 PINS
R
θJA
Junction-to-ambient thermal
85 149 97 95 259 206 206 140 52
resistance
°C/W
R
θJC(top)
Junction-to-case (top) thermal
57 65 39 46 87 131 76 55 9
resistance
(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 MAX UNIT
V
KA
Cathode voltage V
ref
36 V
I
KA
Cathode current 1 100 mA
TL43xxC 0 70
T
A
Operating free-air temperature TL43xxI –40 85 °C
TL43xxQ –40 125
(1) 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.
4 Submit Documentation Feedback Copyright © 2004–2015, Texas Instruments Incorporated
Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B
R2
R1
|z |
KA
(
1 +
(
∆I
∆V
|z'| =
∆I
KA
∆V
KA
|z | =
KA
(2) The dynamic impedance is defined as:
When the device is operating with two external resistors (see Figure 21), the total dynamic impedance of the circuit is given by:
which is approximately equal to .
TL431
,
TL431A
,
TL431B
TL432
,
TL432A
,
TL432B
www.ti.com
SLVS543O –AUGUST 2004–REVISED JANUARY 2015
7.5 Electrical Characteristics, TL431C, TL432C
over recommended operating conditions, T
A
= 25°C (unless otherwise noted)
TL431C, TL432C
PARAMETER TEST CIRCUIT TEST CONDITIONS UNIT
MIN TYP MAX
V
ref
Reference voltage See Figure 20 V
KA
= V
ref
, I
KA
= 10 mA 2440 2495 2550 mV
SOT23-3 and TL432
Deviation of reference input
6 16
V
KA
= V
ref
,
devices
V
I(dev)
voltage over full temperature See Figure 20 mV
I
KA
= 10 mA,
range
(1)
All other devices 4 25
Ratio of change in reference ΔV
KA
= 10 V – V
ref
–1.4 –2.7
ΔV
ref
/
voltage to the change in See Figure 21 I
KA
= 10 mA mV/V
ΔV
KA
ΔV
KA
= 36 V – 10 V –1 –2
cathode voltage
I
ref
Reference input current See Figure 21 I
KA
= 10 mA, R1 = 10 kΩ, R2 = ∞ 2 4 µA
Deviation of reference input
I
I(dev)
current over full temperature See Figure 21 I
KA
= 10 mA, R1 = 10 kΩ, R2 = ∞ 0.4 1.2 µA
range
(1)
Minimum cathode current for
I
min
See Figure 20 V
KA
= V
ref
0.4 1 mA
regulation
I
off
Off-state cathode current See Figure 22 V
KA
= 36 V, V
ref
= 0 0.1 1 µA
|z
KA
| Dynamic impedance
(2)
See Figure 20 V
KA
= V
ref
, f ≤ 1 kHz, I
KA
= 1 mA to 100 mA 0.2 0.5 Ω
(1) The deviation parameters V
ref(dev)
and I
ref(dev)
are defined as the differences between the maximum and minimum values obtained over
the rated temperature range. The average full-range temperature coefficient of the reference input voltage α
Vref
is defined as:
α
Vref
is positive or negative, depending on whether minimum V
ref
or maximum V
ref
, respectively, occurs at the lower temperature.
Copyright © 2004–2015, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: TL431 TL431A TL431B TL432 TL432A TL432B
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