RS431 Datasheet, PDF (1/10 Pages) Orister Corporation – Adjustable Precision Shunt Regulator

RS431
Adjustable Precision Shunt Regulator
Page No. : 1/10
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^oC
● Low Equivalent Full‐range Temperature Coefficient with 20PPM/^oC Typical
Application Circuits
Fig 1. V_K=V_REF
I_I
IN
I_REF
VREF
V_K
I_K
Fig 2. V_K>V_REF
I_I
IN
R_{1 IREF}
R2
V_REF
V_K
IK
Fig 3. Off‐State Current
IN
V_K
I _OFF
Note: V_K=V_REF (1+R₁/R₂)+I_REFxR₁
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
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