XRP431L

September 2010 XRP431L Precision Adjustable Shunt Regulator Rev. 1.2.0 GENERAL DESCRIPTION The XRP431L is a three-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The XRP431L acts as an open-loop error amplifier with a 1.24V temperature compensation reference. The XRP431L has thermal stability, wide operating current of 100mA and broad temperature range of -40°C to 125°C, making it suitable for a variety of applications which require a low-cost, high performance solution. The XRP431L tolerance of 0.5% is proven to be sufficient to overcome all 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 18 volts with two external resistors. The XRP431L is available in RoHS compliant, “green”/halogen free 5-pin SOT23 package. APPLICATIONS Charger Switching Power Supplies Graphic Cards Monitors, VCRs, TVs FEATURES 0.5% Precise Output Voltage − Adjustable 1.24V to 18V Wide Operating Current − 0.1mA to 100mA Low Temperature Coefficient at 20ppm/°C Extended Temperature Range − -40°C to +125°C RoHS Compliant “Green”/Halogen Free 5-pin SOT23 Package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP431L Application Diagram Exar Corporation 48720 Kato Road, Fremont CA 94538, USA www.exar.com Tel. +1 510 668-7000 – Fax. +1 510 668-7001 XRP431L Precision Adjustable...