Page No. : 1/10
RS431
Adjustable Precision Shunt Regulator
General Description
The RS431 series are three‐terminal adjustable regulators with guaranteed thermal stability over applicable
temperature ranges. The output voltage may be set to any value between V
REF
(approximately 2.5 volts) and 36
volts with two external resistors. These devices have a typical dynamic output impedance of 0.2Ω. Active output
circuitry provides a very sharp turn‐on characteristic, making these devices excellent replacement for zener
diodes in many applications.
Features
●
●
●
●
●
●
●
Programmable Precise Output Voltage from 2.5V to 36V
High Stability under Capacitive Load
Low Temperature Deviation: 4.5mV Typical
Low Dynamic Output Resistance: 0.2Ω Typical
Sink Current Capacity from 1mA to 100mA
Low Output Noise
Wide Operating Range of ‐40 to 125
o
C
●
Low Equivalent Full‐range Temperature Coefficient with 20PPM/
o
C Typical
Application Circuits
Fig 1. V
K
=V
REF
I
I
IN
I
REF
I
K
V
REF
R
2
V
REF
V
K
Fig 2. V
K
>V
REF
I
I
IN
R
1
Fig 3. Off‐State Current
V
K
IN
V
K
I
REF
I
K
I
OFF
Note: V
K
=V
REF
(1+R
1
/R
2
)+I
REF
xR
1
This integrated circuit can be damaged by ESD. Orister Corporation recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
DS‐RS431‐09
September,
2009
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
