1

Date: 5/6/04

SPX1432 1.24V Precision Adjustable Shunt Regulator

© Copyright 2004 Sipex Corporation

1.24V Precision Adjustable Shunt Regulator

SPX1432

DESCRIPTION

FEATURES

■ Reference Voltage: 1.24V

■ Initial Accuracy: 0.5%

■ Wide Operating Current, 60µA to 100mA

■ Ultra Low Reference Input Current, 100nA

■ Operating Voltage Range: V

■ 0°C to 105°C Guaranteed Operation

■ SOT-23-3 Package

■ Upgrade to LMV431, TLV431, SC431L

®

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 V

REF

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.

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

■ Voltage References

FUNCTIONAL DIAGRAM

+

-

1.24V

Reference

(R)

Anode (A)

Cathode (K)

1

3

2

SPX1432

ANODE

CATHODE

REF

1

2

3

APPLICATIONS

■ Switching Power Supplies

■ Adjustable Supplies

■ Error Amplifiers

Now Available in Lead Free Packaging