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Rev. 08/13/02

SPX1431 Precision Adjustable Shunt Regulator

© Copyright 2002 Sipex Corporation

Precision Adjustable Shunt Regulator

SPX1431

DESCRIPTION

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

®

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.

resistors. The SPX1431 is available in TO-92, SOIC-8, SOT-89, and SOT-23-5 packages.

APPLICATIONS

■ Battery Operating Equipment

■ Adjustable Supplies

■ Switching Power Supplies

■ Error Amplifiers

■ Single Supply Amplifier

■ Monitors / VCRs / TVs

■ Personal Computers

BLOCK DIAGRAM

+

-

2.5V

Reference

(R)

Anode (A)

Cathode (K)