TL1431-EP_15 Datasheet, PDF (11/23 Pages) Texas Instruments – TL1431-EP Precision-Programmable Reference

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9 Detailed Description
TL1431-EP
SLVS529D – APRIL 2004 – REVISED JANUARY 2015
9.1 Overview
The TL1431-EP is a precision-programmable reference with specified thermal stability over the military
temperature range. The device can be used in a very wide array of applications, and can enter operational mode
with as little as two external resistors.
9.2 Functional Block Diagram
CATHODE
REF
+
−
V_ref
ANODE
9.3 Feature Description
The output voltage can be set to any value between V_I(ref) and 36 V. 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.
TI's EP line is certified to the Aerospace Qualified Electronic Component (AQEC) Standard (ANSI/GEIA STD-
0002-1). The AQEC Standard was jointly developed by the aerospace and semiconductor industries to define the
minimum requirements for commercial-off-the-shelf (COTS) components used in military, avionic, aerospace,
medical and other rugged operating environments where high-reliability and long service life are required.
9.4 Device Functional Modes
The device only has one functional mode, which is enabled at power up. Operation of the device is determined
by external parameters described Application and Implementation.
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