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  • Operational beyond the -60°C to +230°C temperature range.
  • Adjustable output voltage from 2.5V to 40V.
  • Low dynamic output impedance.
  • Sink current capability 500µA to 50mA
  • Low temperature coefficient (ΔVREF=35mV typ).
  • 2.55V reference with 6% accuracy.
  • Fast turn-on response.
  • Shut-down mode.
  • Stable over a continuous range of load capacitors (27nF min).
  • Monolithic design.
  • Ruggedized SMT and thru-hole packages.
  • Also available as bare die.

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 total drift of the reference voltage as low as 35mV (typical). The output voltage may be set from 2.55V 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 500µA to 50mA and load capacitors from 27nF and up. Functionality features include shut-down 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 on-board 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.
Special design techniques were used allowing the XTR431 parts to offer a precise, robust and reliable operation in critical applications. Full functionality is guaranteed from -60°C to +230°C, 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.
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  • Reliability-critical, Automotive, Aeronautics & Aerospace, Down-hole.
  • Shunt regulators, voltage clamping, voltage references, voltage regulators, switching regulators, feedback networks, voltage monitors, current sources.
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Product Reference Temperature Range Package Pin Count Marking
XTR431-D-60°C to +230°CCeramic side brazed DIP8XTR431
XTR431-FE-60°C to +230°CGull-wing flat pack with ePad8XTR431
XTR431-TD-60°C to +230°CTested bare dieXTR431

       Other packages and packaging configurations possible upon request.
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Documentation :
Datasheet :


Application Notes :

XTR431 LTSpice Model

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