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SLVS534B − JUNE 2004 − REVISED APRIL 2008
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D Qualified for Automotive Applications
D 0.4% Initial Voltage Tolerance
D 0.2-Ω Typical Output Impedance
D Fast Turnon . . . 500 ns
D Sink Current Capability ...1 mA to 100 mA
D Low Reference Current (REF)
D Adjustable Output Voltage ...V
I(ref)
to 36 V
description/ordering information
The TL1431 is a precision programmable reference with specified thermal stability over the automotive
temperature range. The output voltage can be set to any value between V
I(ref)
(approximately 2.5 V) and 36 V
with two external resistors (see Figure 16). This device has a typical output impedance of 0.2 Ω. Active output
circuitry provides a very sharp turnon characteristic, making the device an excellent replacement for Zener
diodes and other types of references in applications such as onboard regulation, adjustable power supplies,
and switching power supplies.
The TL1431Q is characterized for operation over the full automotive temperature range of −40°C to 125°C.
ORDERING INFORMATION
{
T
A
PACKAGE
‡
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
−40°C to 125°C SOIC (D) Reel of 2500 TL1431QDRQ1 1431Q1
†
For the most current package and ordering information, see the Package Option Addendum at the
end of this document, or see the TI web site at http://www.ti.com.
‡
Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
symbol
REF
ANODE
CATHODE
Copyright 2008, Texas Instruments Incorporated !"# $"%&! '#(
'"! ! $#!! $# )# # #* "#
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#- && $##(
1
2
3
4
8
7
6
5
CATHODE
ANODE
ANODE
NC
REF
ANODE
ANODE
NC
D PACKAGE
(TOP VIEW)
NC − No internal connection
ANODE terminals are connected internally.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
