SPX431LN-L

SPX431L Precision Adjustable Shunt Regulator July 2013 Rev. 2.0.1 GENERAL DESCRIPTION The SPX431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX431L acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431L’s thermal stability, wide operating current (100mA) and temperature range (0°C to 105°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX431L tolerance of 0.5% is proven to be sufficient to overcome all of the other errors in the system to virtually eliminate the need for trimming in the power supply manufacturer's assembly line and contribute a significant cost savings. The output voltage may be adjusted to any value between VREF and 20V with two external resistors. The SPX431L is available in TO-92, and SOT-89 packages. APPLICATIONS • Battery Operating Equipment • Adjustable Supplies • Switching Power Supplies • Error Amplifiers • Single Supply Amplifier • Monitors / VCRs / TVs • Personal Computers FEATURES • Tight Voltage Tolerance 0.5% at 10mA • Wide Operating Current 1mA to 100mA • Extended Temperature Range: 0°C to 105°C • Low Temperature Coefficient 30 ppm/°C • Improved Replacement in Performance for TL431 and AS431 • Low Cost Solution TYPICAL BLOCK DIAGRAM Fig. 1: SPX431L Precision Adjustable Shunt Regulator Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 SPX431L Precision Adjustable Shunt Regulator ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Input Voltage Range VKA ................................ VREF to 20V Cathode Current IK ...........................................10ma Junction Temperature Range ................................150 °C Thermal Resistance 0JA (TO-92) .................................................160°C/W 0JC (TO-92) .................................................. 80°C/W Typical Derating (TO-92) ...........................6.3 mW/°C Cathode-Anode Reverse Breakdown VKA .................. 20V Anode-Cathode Forward Current, ( VREF 8/11 Fig. 27: Test Circuit for IKOFF Rev. 2.0.1 SPX431L Precision Adjustable Shunt Regulator PACKAGE SPECIFICATION © 2013 Exar Corporation 3 PIN TO-92 9/11 Rev. 2.0.1 SPX431L Precision Adjustable Shunt Regulator PACKAGE SPECIFICATION © 2013 Exar Corporation 3 PIN SOT-89 10/11 Rev. 2.0.1 SPX431L Precision Adjustable Shunt Regulator REVSION HISTORY Revision Date 2.0.0 06/12/2012 Reformatted Datasheet. Corrected Package Drawing Description 2.0.1 07/19/2013 Update package marking information and updated corporate logo. FOR FURTHER ASSISTANCE Email: customersupport@exar.com Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx? EXAR CORPORATION HEADQUARTERS AND SALES OFFICES 48720 Kato Road Fremont, CA 94538 – USA Tel.: +1 (510) 668-7000 Fax: +1 (510) 668-7030 www.exar.com NOTICE EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a user’s specific application. While the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. EXAR Corporation does not recommend the use of any of its products in life support applications where the failure malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances. or its in all Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited. © 2013 Exar Corporation 11/11 Rev. 2.0.1