CYStech Electronics Corp.
Adjustable Precision Shunt Regulators
Spec. No. : C502A3
Issued Date : 2003.03.26
Revised Date : 2005.06.29
Page No. : 1/6
TL431XA3
Description
The TL431 series are three-terminal adjustable regulators with guaranteed
TO-92
thermal stability over applicable temperature ranges. The output voltage
may be set to any value between VREF (approximately 2.495 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 output voltage
• Temperature coefficient is 50ppm/°C typical
• Temperature compensated for operation over
• full temperature range
• Low output noise voltage
• Fast turn on response
• Pb-free package
Classification
Rank
VREF
A
2.495±0.5%
B
2.495±1%
C
2.495±2%
Absolute Maximum Ratings
(Operating temperature range applies unless otherwise specified)
Characteristics
Symbol
Value
Unit
Cathode Voltage
Cathode Current Range (Continuous)
Reference Input Current Range
Power Dissipation
Operating Temperature Range
Storage Temperature Range
VKA
37
V
IK
-100~+150
mA
IREF
0.05~+10
mA
PD
770
mW
Topr
0~+70
°C
Tstg
-65~+150
°C
TL431A3
CYStek Product Specification