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431CCM Datasheet

  • 431CCM

  • Adjustable Precision Zener Shunt Regulator

  • 12頁

  • NSC

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LM431 Adjustable Precision Zener Shunt Regulator
March 2002
LM431
Adjustable Precision Zener Shunt Regulator
General Description
The LM431 is a 3-terminal adjustable shunt regulator with
guaranteed temperature stability over the entire temperature
range of operation. It is now available in a chip sized pack-
age (4-Bump micro SMD) using National鈥檚 micro SMD pack-
age technology. The output voltage may be set at any level
greater than 2.5V (V
REF
) up to 36V merely by selecting two
external resistors that act as a voltage divided network. Due
to the sharp turn-on characteristics this device is an excel-
lent replacement for many zener diode applications.
Features
n
Average temperature coefficient 50 ppm/藲C
n
Temperature compensated for operation over the full
temperature range
n
Programmable output voltage
n
Fast turn-on response
n
Low output noise
n
LM431 in micro SMD package
n
See AN-1112 for micro SMD considerations
Connection Diagrams
TO-92: Plastic Package
SOT-23: 3-Lead Small Outline
DS010055-28
DS010055-1
Top View
4-Bump micro SMD
Top View
SO-8: 8-Pin Surface Mount
DS010055-54
DS010055-2
Top view
Top View
(bump side down)
Note:
*
NC = Not internally connected. Must be electrically isolated from the
rest of the circuit for the microSMD package.
漏 2002 National Semiconductor Corporation
DS010055
www.national.com

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