SPX1431

® SPX1431 Precision Adjustable Shunt Regulator FEATURES ■ Trimmed Bandgap Reference to 0.4% ■ Wide Operating Current 1mA to 150mA ■ Extended Temperature Range: -55°C to 125°C ■ Low Temperature Coefficient 30 ppm/°C ■ Offered in TO-92, SOIC, SOT-89, SOT-23-5 ■ Improved Replacement in Performance for LT1431 ■ Low Cost Solution DESCRIPTION APPLICATIONS ■ Battery Operating Equipment ■ Adjustable Supplies ■ Switching Power Supplies ■ Error Amplifiers ■ Single Supply Amplifier ■ Monitors / VCRs / TVs ■ Personal Computers The SPX1431 is a 3-terminal adjustable shunt voltage regulator providing a highly accurate bandgap reference. The SPX1431 acts as an open-loop error amplifier with a 2.5V temperature compensation reference. The SPX1431's thermal stability, wide operating current (150mA) and temperature range (-55°C to 125°C) makes it suitable for a variety of applications that require a low cost, high performance solution. SPX1431 tolerance of 0.4% 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 lines and contributes a significant cost savings. The output voltage may be adjusted to any value between VREF and 36 volts with two external resistors. The SPX1431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages. BLOCK DIAGRAM Cathode (K) Reference (R) + 2.5V Anode (A) Rev. 08/13/02 SPX1431 Precision Adjustable Shunt Regulator © Copyright 2002 Sipex C...