Important notice
Dear Customer,
On 7 February 2017 the former NXP Standard Product business became a new company with the
tradename
Nexperia.
Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS
semiconductors with its focus on the automotive, industrial, computing, consumer and wearable
application markets
In data sheets and application notes which still contain NXP or Philips Semiconductors references, use
the references to Nexperia, as shown below.
Instead of http://www.nxp.com, http://www.philips.com/ or http://www.semiconductors.philips.com/,
use
http://www.nexperia.com
Instead of sales.addresses@www.nxp.com or sales.addresses@www.semiconductors.philips.com, use
salesaddresses@nexperia.com
(email)
Replace the copyright notice at the bottom of each page or elsewhere in the document, depending on
the version, as shown below:
- © NXP N.V. (year). All rights reserved or © Koninklijke Philips Electronics N.V. (year). All rights
reserved
Should be replaced with:
-
© Nexperia B.V. (year). All rights reserved.
If you have any questions related to the data sheet, please contact our nearest sales office via e-mail
or telephone (details via
salesaddresses@nexperia.com).
Thank you for your cooperation and
understanding,
Kind regards,
Team Nexperia
SO
T2
3
TL431 family
Adjustable precision shunt regulator
Rev. 5 — 01 September 2015
Product data sheet
1. Product profile
1.1 General description
Three-terminal shunt regulator family with an output voltage range between V
ref
and 36 V,
to be set by two external resistors.
•
The TL431xDBZR types feature an enhanced stability area with a very low
load capacity requirement.
•
The TL431xFDT types offer an enhanced stability area and a higher
ElectroMagnetic Interference (EMI) ruggedness, for example, for Switch Mode Power
Supply (SMPS) applications.
•
The TL431xSDT types are designed for standard requirements and linear
applications.
Table 1.
Product overview
Temperature range (T
amb
)
0C to 70
C
TL431CDBZR
40 C
to 85
C
TL431IDBZR
40 C
to 125
C
TL431QDBZR
TL431FDT
TL431MFDT
TL431SDT
TL431MSDT
1%
TL431ACDBZR
TL431AIDBZR
TL431AQDBZR
TL431AFDT
TL431AMFDT
TL431ASDT
TL431AMSDT
0.5 %
TL431BCDBZR
TL431BIDBZR
TL431BQDBZR
TL431BFDT
TL431BMFDT
TL431BSDT
TL431BMSDT
Pinning
configuration
(see
Table 3)
normal pinning
normal pinning
mirrored pinning
normal pinning
mirrored pinning
normal pinning
normal pinning
mirrored pinning
normal pinning
mirrored pinning
normal pinning
normal pinning
mirrored pinning
normal pinning
mirrored pinning
Reference
voltage
tolerance (V
ref
)
2%
NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
1.2 Features and benefits
Programmable output voltage up to 36 V
Three different reference voltage tolerances:
Standard grade: 2 %
A-Grade: 1 %
B-Grade: 0.5 %
Typical temperature drift: 6 mV (in a range of 0
C
up to 70
C)
Low output noise
Typical output impedance: 0.2
Sink current capability: 1 mA to 100 mA
AEC-Q100 qualified (grade 1)
1.3 Applications
Shunt regulator
Precision current limiter
Precision constant current sink
Isolated feedback loop for Switch Mode Power Supply (SMPS)
1.4 Quick reference data
Table 2.
Symbol
V
KA
I
K
V
ref
Quick reference data
Parameter
cathode-anode voltage
cathode current
reference voltage
V
KA
= V
ref
;
I
K
= 10 mA;
T
amb
= 25
C
2440
2470
2483
2495
2495
2495
2550
2520
2507
mV
mV
mV
Conditions
Min
V
ref
1
Typ
-
-
Max
36
100
Unit
V
mA
Standard-Grade (2 %)
A-Grade (1 %)
B-Grade (0.5 %)
TL431 family
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 5 — 01 September 2015
2 of 27
NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
2. Pinning information
Table 3.
Pin
1
2
3
Pinning
Symbol
k
REF
a
Description
cathode
reference
anode
Simplified outline
Graphic symbol
Normal pinning: All types without MFDT and MSDT ending
3
a
REF
k
006aab355
1
2
Mirrored pinning: All types with MFDT and MSDT ending
1
2
3
REF
k
a
reference
cathode
anode
3
a
REF
k
006aab355
1
2
TL431 family
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 5 — 01 September 2015
3 of 27
NXP Semiconductors
TL431 family
Adjustable precision shunt regulator
3. Ordering information
Table 4.
Ordering information
Package
Name
TL431CDBZR
TL431IDBZR
TL431QDBZR
TL431FDT
TL431MFDT
TL431SDT
TL431MSDT
TL431ACDBZR
TL431AIDBZR
TL431AQDBZR
TL431AFDT
TL431AMFDT
TL431ASDT
TL431AMSDT
TL431BCDBZR
TL431BIDBZR
TL431BQDBZR
TL431BFDT
TL431BMFDT
TL431BSDT
TL431BMSDT
-
Description
plastic surface-mounted package; 3 leads
Version
SOT23
Type number
TL431 family
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 5 — 01 September 2015
4 of 27
