SSPPXX443311AA PPrreecciissiioonn AAddjjuussttaabbllee SShhuunntt RReegguullaattoorr April 2009 Rev. 2.0.0 GENERAL DESCRIPTION APPLICATIONS The SPX431A is a three-terminal adjustable Charger shunt voltage regulator providing a highly Switching Power Supplies accurate bandgap reference. Graphic Cards The SPX431A acts as an open-loop error Monitors, VCRs, TVs amplifier with a 2.5V temperature compensation reference. The SPX431A has thermal stability, wide operating current of FEATURES 150mA and broad temperature range of -40C to 125C, making it suitable for a variety of 0.5% Precise Output Voltage applications which require a low-cost, high Adjustable up to 36V performance solution. The SPX431A tolerance Wide Operating Current of 0.5% is proven to be sufficient to overcome all other errors in the system to virtually 1mA to 150mA eliminate the need for trimming in the power Low Temperature Coefficient supply manufacturer s assembly line and at 30ppm/C contribute a significant cost savings. The output voltage may be adjusted to any value Extended Temperature Range between V and 36 volts with two external REF -40C to +125C resistors. Improved Replacment for TL431 The SPX431A is available in RoHS compliant, RoHS Compliant, Lead Free lead free TO-92 and SOT89 packages. TO-92 and SOT-89 Packages TYPICAL APPLICATION DIAGRAM Fig. 1: SPX431A Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SSPPXX443311AA PPrreecciissiioonn AAddjjuussttaabbllee SShhuunntt RReegguullaattoorr ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Cathode-Anode Reverse Breakdown Volt. V .............36V KA the device at these ratings or any other above those Operating Cathode Current (cont.) I ................ <100mA KA indicated in the operation sections of the specifications Ambient Temperature Range....................-40C to 125C below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Cathode-Anode Reverse Breakdown Volt. V ............. 37V KA Operating Cathode Current (cont.) I ...................150mA KA Reference Input Current Range I .........................10mA REF Power Dissipation SOT-89-TO-92 (Cont. 25C) P ..770mW D Junction Temperature ..........................................150C Storage Temperature T ........................ -65C to 150C STG ESD Rating (HBM - Human Body Model).................... 2kV ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Ambient Temperature of T = 25C only limits applying over the full A Operating Ambient Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided A for reference purposes only. Parameter Min. Typ. Max. Units Conditions Test circuit 1 Reference Voltage 2.493 2.503 2.515 V V =V , I =10mA KA REF KA Test circuit 1 V with temperature T 4.5 8 mV REF C V =V , I =10mA, 0C T 70C KA REF KA A Test circuit 1 V with temperature T 4.5 16 mV REF C V =V , I =10mA KA REF KA Test circuit 2 -2.7 -1.0 V V 10V, I =10mA Ratio of change in V to REF KA KA REF mV/V Cathode Voltage V / V REF KA Test circuit 2 -2 -0.4 10V V 36V, I =10mA KA KA Test circuit 2 Reference Input Current I 0.7 4 A REF I =10mA, R1=10k , R2= KA Test circuit 2 I Temperature Deviation I 0.4 1.2 A REF REF I =10mA, R1=10k , R2= KA Test circuit 1 Minimum I for Regulation KA 0.4 1 mA I V =V KA(MIN) KA REF Test circuit 3 Off State Leakage I 40 250 nA KA(OFF) V =0, V =36V KA REF Test circuit 1 Dynamic Outout Impedance Z 0.15 0.5 KA f 1KHz, I =1 to 100mA Z KA 2009 Exar Corporation 2/11 Rev. 2.0.0