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ATL431LI_V02 Datasheet(Hoja de datos) 11 Page - Texas Instruments

No. de Pieza. ATL431LI_V02
Descripción  ATL431LI / ATL432LI High Bandwidth Low-Iq Programmable Shunt Regulator
Descarga  29 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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 11 page
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CATHODE
REF
ANODE
CATHODE
REF
ANODE
+
_
Vref
11
ATL431LI
ATL432LI
www.ti.com
SLVSDU6D – JULY 2017 – REVISED NOVEMBER 2019
Product Folder Links: ATL431LI ATL432LI
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Copyright © 2017–2019, Texas Instruments Incorporated
10 Detailed Description
10.1 Overview
This standard device has proven ubiquity and versatility across a wide range of applications, ranging from power
to signal path. This is due to its key components containing an accurate voltage reference and opamp, which are
very fundamental analog building blocks. ATL431LI is used in conjunction with its key components to behave as
a single voltage reference, error amplifier, voltage clamp or comparator with integrated reference.
ATL431LI can be operated and adjusted to cathode voltages from 2.5V to 36V, making this part optimal for a
wide range of end equipments in industrial, auto, telecom & computing. In order for this device to behave as a
shunt regulator or error amplifier, >80µA (Imin(maximum)) must be supplied in to the cathode pin. Under this
condition, feedback can be applied from the Cathode and Ref pins to create a replica of the internal reference
voltage.
Various reference voltage options can be purchased with initial tolerances (at 25°C) of 0.5%, and 1%. These
reference options are denoted by B (0.5%) and A (1.0%) after the ATL431LI or ATL432LI. ATL431LI and
ATL432LI are both functionally the same, but have separate pinout options.
The ATL43xLIxQ devices are characterized for operation from –40°C to +125°C.
10.2 Functional Block Diagram
Figure 21. Equivalent Schematic
Figure 22. Detailed Schematic




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