SPX431A

April 2009 SPX431A Precision Adjustable Shunt Regulator Rev. 2.0.0 GENERAL DESCRIPTION The SPX431A is a three-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX431A acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX431A has thermal stability, wide operating current of 150mA 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 SPX431A 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 36 volts with two external resistors. The SPX431A is available in RoHS compliant, lead free TO-92 and SOT89 packages. APPLICATIONS Charger Switching Power Supplies Gra...