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Rev. 08/13/02

SPX2431L Precision Adjustable Shunt Regulator

© Copyright 2002 Sipex Corporation

Precision Adjustable Shunt Regulator

SPX2431L

DESCRIPTION

FEATURES

■ Trimmed Bandgap to 0.5% and 1.0%

■ Wide Operating Current 160µA to 100mA

■ Extended Temperature Range:

0°C to 105°C

■ Low Temperature Coefficient 30 ppm/°C

■ Offered in TO-92, SOIC, SOT-23-3

■ Replacement for TL431 and AS2431L

■ Low Cost Solution

®

The SPX2431L is a 3-terminal adjustable shunt voltage regulator providing a highly accurate

bandgap reference (0.5%) and extremely low operating current (100µA). The SPX2431L acts

as an open-loop error amplifier with a 2.5V temperature compensated reference. The

SPX2431L's thermal stability, wide operating current (100mA) and temperature range (0°C to

150°C) makes it suitable for a variety of applications. SPX2431LA tolerance of 0.5% is proven

to be sufficient to overcome all 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.

In the standard shunt configuration, the combination of a low temperature coefficient, sharp

turn on characteristics, low output impedance, and programmable output voltage makes this

precision reference an excellent error amplifier. The SPX2431L is available in TO-92, SOIC-8,

and SOT-23-3 package.

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)