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參數資料
| 型號： | RA0431 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Low-Voltage Adjustable Precision Shunt Regulator(低電壓精度可調分流穩壓器) |
| 中文描述： | 低電壓可調節精密并聯穩壓器（低電壓精度可調分流穩壓器） |
| 文件頁數： | 1/8頁 |
| 文件大小： | 39K |
| 代理商： | RA0431 |
www.fairchildsemi.com
Features
Low voltage operation to 1.24V
1% reference voltage tolerance
Output voltage adjustable from V
ref
to 12V
Low 80
μ
A operational cathode current
0.25
typical output impedance
SOT23-5 package
Applications
Voltage reference for discrete power circuits
Description
The RA0431 is a low-voltage 3-terminal adjustable precision
voltage reference regulator. It has an excellent thermal stabil-
ity over the standard commercial temperature range. The
output voltage can be set to any value between Vref (1.24V)
and 12V using two external resistors. The RA0431 operates
from a lower voltage (1.24V) than the traditional shunt regu-
lator references which operate from 2.5V. When used with an
optocoupler, the RA0431 will be an ideal voltage reference
in an isolated feedback circuit for use in switched-mode
power supplies and modular DC-DC converters. The
RA0431 has a low output impedance of active output
circuitry offering a very sharp turn-on characteristic.
The RA0431 will be an excellent replacement for low-
voltage zener diodes in many applications such as on-board
regulation and adjustable power supplies.
Symbol
Block Diagram
RA0431
Low-Voltage Adjustable Prec ision S hunt Regulator
REF
65-431A-01
Anode
Cathode
V
ref
= 1.24V
REF
+
_
CATHODE
ANODE
65-431A-02
Rev. 1.0.1
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