SPX1432

® SPX1432 1.24V Precision Adjustable Shunt Regulator FEATURES ■ ■ ■ ■ ■ ■ ■ ■ Reference Voltage: 1.24V Initial Accuracy: 0.5% Wide Operating Current, 60µA to 100mA Ultra Low Reference Input Current, 100nA Operating Voltage Range: VREF to 20V 0°C to 105°C Guaranteed Operation SOT-23-3 Package Upgrade to LMV431, TLV431, SC431L ANODE 3 3 SPX1432 1 1 2 2 REF CATHODE Now Available in Lead Free Packaging ■ ■ ■ ■ APPLICATIONS ■ Switching Power Supplies ■ Adjustable Supplies ■ Error Amplifiers Single Supply Amplifier Monitors / VCRs / TVs Personal Computers Voltage References DESCRIPTION The SPX1432 is a three terminal adjustable shunt voltage regulator that provides a highly accurate 1.24V bandgap reference with 0.5% accuracy, eliminating the need for trimming in most power supply designs. Offered in the tiny SOT-23 package, the SPX1432 has an extremely wide operating current range of 60uA to 100mA, and reference input current of only 100nA (typ). The SPX1432 can regulate outputs from VREF to 20V, using two external resistors, and is guaranteed over the extended commercial temperature range of 0°C to 105°C. The combination of the small size, wide output current capability, flexible voltage range, and stable performance over the entire extended commercial temperature range, makes the SPX1432 the ideal candidate a variety of shunt regulator and current source designs in applications such as Portable meters, Instrumentation, and Industrial Process Control. FUNCTIONAL DIAGRA...