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431BCMNSN/a32avaiAdjustable Precision Zener Shunt Regulator


431BCM ,Adjustable Precision Zener Shunt RegulatorFeaturesn Average temperature coefficient 50 ppm/˚CThe LM431 is a 3-terminal adjustable shunt regul ..
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431BCM
Adjustable Precision Zener Shunt Regulator
LM431
Adjustable Precision Zener Shunt Regulator
General Description

The LM431isa 3-terminal adjustable shunt regulator with
guaranteed temperature stability overthe entiretemperature
rangeof operation.Itis now availableina chip sized pack-
age (4-Bump micro SMD) using National’s micro SMD pack-
age technology.The output voltage maybesetatany level
greater than 2.5V (VREF)upto36V merelyby selectingtwo
external resistorsthatactasa voltage divided network. Duethe sharp turn-on characteristicsthis deviceisan excel-
lent replacementfor many zener diode applications.
Features
Average temperature coefficient50 ppm/˚C Temperature compensatedfor operation overthefull
temperature range Programmable output voltage Fast turn-on response Low output noise LM431in micro SMD package
Connection Diagrams
TO-92: Plastic Package

DS010055-1
Top View
SO-8: 8-Pin Surface Mount

DS010055-2
Top view
SOT-23: 3-Lead Small Outline

DS010055-28
Top View
4-Bump micro SMD

DS010055-54
Top View
(bump side down)

December 1999
LM431
Adjustable
Precision
Zener
Shunt
Regulator

©1999 National Semiconductor Corporation DS010055
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