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| 型號： | 431CCM |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | OSC 5V 8PIN CMOS |
| 中文描述： | 可調(diào)精密齊納并聯(lián)穩(wěn)壓器 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 380K |
| 代理商： | 431CCM |
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’s 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/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
Note: *NC = Not internally connected. Must be electrically isolated from the
rest of the circuit for the microSMD package.
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)
March 2002
LM431
Adjustable
Precision
Zener
Shunt
Regulator
2002 National Semiconductor Corporation
DS010055
www.national.com
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