XTRM Series Distributed by XTR431-FE HIGH-TEMPERATURE PROGRAMMABLE SHUNT REGULATOR FEATURES DESCRIPTION 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 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. PRODUCT HIGHLIGHT Shunt Regulator VIN 3-40V Series Regulator VIN 3-40V Rlim High-current Shunt Regulator VIN 3-40V Rlim Rlim Rz R1 R1 R1 Cout Cout R2 R2 R2 ORDERING INFORMATION X Source: X = X-REL Semi Product Reference XTR431-BD XTR431-FE XTR431-D TR Process: TR = HiTemp, HiRel Temperature Range -60°C to +230°C -60°C to +230°C -60°C to +230°C Package Bare die Flat pack with exposed pad Ceramic side braze DIL 431 Part number Pin Count 8 8 Marking XTR431 XTR431 XTR431 Other packages and packaging configurations possible upon request. For Full Specification Please Contact: [email protected] DS-0033-11 rev2C 2012-05-15 © 2012 X-REL Semiconductor 1 of 7 PROPRIETARY INFORMATION Tel: +44 (0)1603 788967 Web: www.micross.com www.x-relsemi.com