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XTRM Series
1-BD
DS-0033-11 rev2C 2012-05-15
© 2012 X-REL Semiconductor
FEATURES
DESCRIPTION
Shunt Regulator
Series Regulator
High-current Shunt Regulator
X
TR 431
Source:
X = X-REL Semi
Process:
TR = HiTemp, HiRel
Part number
Product Reference
Temperature Range
Package
Pin Count
Marking
XTR431-BD
-60°C to +230°C
Bare die
XTR431
XTR431-FE
-60°C to +230°C
Flat pack with exposed pad
8
XTR431
XTR431-D
-60°C to +230°C
Ceramic side braze DIL
8
XTR431
Distributed by
XTR43
HIGH-TEMPERATURE PROGRAMMABLE SHUNT REGULATOR
Adjustable output voltage from 3V to 40V.
Operational beyond the -60°C to +230°C temperature range.
Low dynamic output impedance.
Sink current capability 250µA to 100mA
Low temperature coefficient (<100ppm/°C).
2.5V reference with 4% accuracy over the -60°C to +230°C
temperature range.
Fast turn-on response.
Shut-down mode.
Stable over a continuous range of load capacitors (100nF
min).
Monolithic design.
Ruggedized SMT and thru-hole packages.
Also available as bare die.
APPLICATIONS
Reliability-critical, Automotive, Aeronautics & Aerospace,
Down-hole.
Voltage references, voltage regulators, switching regulators,
feedback networks, voltage monitors, current sources.
XTR431 is a high-reliability, high-temperature version of the well
known “431” shunt voltage regulator . It operates as a 3-terminal
shunt regulator with an average temperature coefficient (TC) as
low as 100ppm/°C. The output voltage may be set from 3V to
40V by selecting the value of two external resistors implementing
a divider network.
The XTR431 is able to reliably operate over a wide range of currents from 250µA to 100mA. Functionality features include shutdown
mode and low dynamic output impedance.
This part can be used as a high-reliability, high-temperature replacement of zener diodes in many applications such as onboard regulation, adjustable power supply and switching power
supplies. The fact of operating as a zener diode makes the
XTR431 convenient to be used as a positive or negative regulator.
Especial design techniques were used allowing the XTR431 parts
to offer a precise, robust and reliable operation in critical applic ations. Full functional
though operation well below and above this temperature range is
achieved.
The XTR431 has been designed to reduce system cost and ease
adoption by reducing the learning curve and providing smart and
easy to use features.
XTR431 is available in ruggedized SMT and thru-hole packages.
Parts are also available as bare dies.
ity is guaranteed from -60°C to +230°C,
PRODUCT HIGHLIGHT
VIN
3-40V
ORDERING INFORMATION
R1
R2
Rlim
Cout
VIN
3-40V
Rlim
R1
R2
Cout
VIN
3-40V
Rlim
Rz
R1
R2
Other packages and packaging configurations possible upon request.
For Full Specication Please Contact: hitemp@micross.com
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PROPRIETARY INFORMATION
Tel: +44 (0)1603 788967
Web: www.micross.com
www.x-relsemi.com
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