鈥?/div>
Low voltage operation to 1.24V
1% reference voltage tolerance
Output voltage adjustable from V
ref
to 12V
Low 80碌A(chǔ) operational cathode current
0.25鈩?typical output impedance
SOT23-5 package
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.
Applications
鈥?Voltage reference for discrete power circuits
Symbol
REF
Anode
Cathode
65-431A-01
Block Diagram
CATHODE
REF
+
_
V
ref
= 1.24V
65-431A-02
ANODE
Rev. 1.0.1